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3. Tòa nhà HCO Building (tên gọi khác Hanoi Central Office Building) là tòa văn phòng hạng A  tại số 44B Lý Thường Kiệt, Hoàn Kiếm, Hà Nội. Tòa nhà được đầu tư xây dựng và quản lý bởi Tập đoàn Melia – một trong những tập đoàn danh tiếng hàng đầu thế giới về lĩnh vực khách sạn cũng như các tòa nhà văn phòng. Tòa nhà đã và đang được nhiều doanh nghiệp, công ty trong và ngoài nước lựa chọn để đặt trụ sở văn phòng, tổ chức các sự kiện, cuộc họp, triển lãm…
4. Địa chỉ: Tòa nhà HCO, 44B P. Lý Thường Kiệt, P, Hoàn Kiếm, Hà Nội, Việt Nam
5. Phone: 024 3824 9595
6. Website:
7. https://hcobuilding.com/
8. https://twitter.com/hcobuildingcom
9. https://www.pinterest.com/hcobuildingcom/
10. https://www.youtube.com/channel/UCJEt-u0z4yHlog8unQI8vxg/about
11. https://www.reddit.com/user/hcobuildingcom/
12. https://hcobuildingcom.wordpress.com/
13. https://gravatar.com/hcobuildingcom
14. https://www.pearltrees.com/hcobuildingcom
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18. https://sites.google.com/view/hcobuildingcom/
19. https://about.me/hcobuildingcom/
20. https://hcobuildingcom.blogspot.com/
21. https://www.blogger.com/profile/05674493896596023697
22. http://www.chenjiagou.net/home.php?mod=space&uid=215374
23. http://www.video-bookmark.com/user/hcobuildingcom
24. https://band.us/band/97163034/intro
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26. https://www.bitchute.com/channel/GLIKDMG5nPaA
27. https://www.cake.me/hcobuildingcom
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29. https://photoclub.canadiangeographic.ca/profile/21463984
30. https://raovat.nhadat.vn/members/hcobuildingcom-154505.html
31. https://tinhte.vn/members/hcobuildingcom.3251666/
32. https://www.kickstarter.com/profile/hcobuildingcom/about
33. https://play.eslgaming.com/player/20525813/
34. https://groups.google.com/u/0/g/hcobuildingcom/c/o2nV71mg_8M
35. https://audiomack.com/hcobuildingcom
36. https://us.enrollbusiness.com/BusinessProfile/7003457/Hco-Building-Abbeville-AL
37. https://participation.bordeaux.fr/profiles/hcobuildingcom/activity
38. https://noti.st/hcobuildingcom
39. https://roomstyler.com/users/hcobuildingcom
40. https://wmart.kz/forum/user/205693/
41. https://leetcode.com/u/hcobuildingcom/
42. https://hcgdietinfo.com/hcgdietforums/members/hcobuildingcom/
43. https://www.spigotmc.org/members/hcobuildingcom.2191437/
44. https://www.newscionxb.com/members/hcobuildingcom.40579/
45. https://public.tableau.com/app/profile/hcobuildingcom/vizzes
46. https://myanimelist.net/profile/hcobuildingcom
47. https://www.chordie.com/forum/profile.php?id=2167904
48. https://www.goodreads.com/hcobuildingcom
49. https://allmyfaves.com/hcobuildingcom
50. https://manylink.co/@hcobuildingcom
51. https://dlive.tv/hcobuildingcom
52. https://getinkspired.com/en/u/hcobuildingcom/
53. https://www.canadavideocompanies.ca/forums/users/hcobuildingcom/
54. https://drill.lovesick.jp/drilldata/index.php?hcobuildingcom
55. https://www.furaffinity.net/user/hcobuildingcom
56. https://atlanta.bubblelife.com/users/hcobuildingcom
57. https://myspace.com/hcobuildingcom
58. http://hcobuildingcom.geoblog.pl/
59. http://emseyi.com/user/hcobuildingcom
60. https://www.mapleprimes.com/users/hcobuildingcom
61. https://www.slideserve.com/hcobuildingcom
62. https://pubhtml5.com/homepage/mahsw/
63. https://issuu.com/hcobuildingcom
64. https://gifyu.com/hcobuildingcom
65. https://bulkwp.com/support-forums/users/hcobuildingcom/
66. https://hcobuildingcom.exposure.co/hcobuildingcom/
67. https://bg.gta5-mods.com/users/hcobuildingcom
68. https://inkbunny.net/hcobuildingcom
69. https://os.mbed.com/users/hcobuildingcom/
70. https://www.huntingnet.com/forum/members/hcobuildingcom.html
71. https://www.rctech.net/forum/members/hcobuildingcom-431217.html
72. https://www.myminifactory.com/users/hcobuildingcom
73. https://www.betting-forum.com/members/hcobuildingcom.87532/
74. https://www.blackhatworld.com/members/hcobuildingcom.2074033/
75. http://www.rohitab.com/discuss/user/2469602-hcobuildingcom/
76. https://hcobuildingcom.mystrikingly.com/
77. https://decidim.santcugat.cat/profiles/hcobuildingcom/activity
78. https://hcobuildingcom.website3.me/
79. https://allmylinks.com/hcobuildingcom
80. https://fliphtml5.com/homepage/ynnxt/
81. https://anyflip.com/homepage/qyegq
82. https://www.weddingbee.com/members/hcobuildingcom/
83. https://hcobuildingcom.webflow.io/
84. https://www.halaltrip.com/user/profile/188314/hcobuildingcom/
85. https://wiki.gta-zona.ru/index.php/%D0%A3%D1%87%D0%B0%D1%81%D1%82%D0%BD%D0%B8%D0%BA:Hcobuildingcom
86. https://forums.megalith-games.com/member.php?action=profile&uid=1384755
87. https://malt-orden.info/userinfo.php?uid=386614
88. https://www.speedrun.com/users/hcobuildingcom
89. https://pxhere.com/en/photographer/4479450
90. https://www.designspiration.com/hcobuildingcom/
91. https://slatestarcodex.com/author/hcobuildingcom/
92. https://advego.com/profile/hcobuildingcom/
93. https://amaz0ns.com/forums/users/hcobuildingcom/
94. https://hintstock.com/hint/users/hcobuildingcom/
95. https://git.forum.ircam.fr/hcobuildingcom
96. http://iki-iki.sakura.ne.jp/members/miyano/mtgwiki/index.php?hcobuildingcom
97. http://garyo.sakura.ne.jp/LTSA/index.php?hcobuildingcom
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