Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
van thanh » ban thanh, van tuan
thanh de » hanh de, thanh ve, thanh do
cac cuoc » cac nuoc, ca cuoc, cac quoc
sach ky » sac ky, sach y, sach ty
cac suc » cao suc, cac nuoc, cac quoc
hieu ve » hieu va, hieu van
de cua » le cua, te cua, dieu cua
cua te » cua tu
x hoi » o hoi, x ho, 5 hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ky nang ((x hoi) or (xa hoi)). hieu ve ((cac suc) OR (cac cuoc)) van thanh de cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky nang ((x hoi) OR (xa hoi)). hieu ve ((cac suc) OR (cac cuoc)) van thanh de cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky nang ((x hoi) or (xa hoi)). hieu ve ((cac suc) OR (cac cuoc)) van thanh de cua te".
• Adding a wildcard symbol may retrieve word variants: thuat sach ky nang ((x hoi) or (xa hoi)). hieu ve ((cac suc) OR (cac cuoc)) van thanh de cua te*.