Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh dam » thanh dat, thanh nam, thanh tam
toc sach » doc sach, thuoc sach, nuoc sach
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
hoc sach » hoc sinh, hoc cac, hoc anh
dam cua » dai cua, day cua, nam cua
tu nang » tru nang, tu nong, tu nano
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
cac xuc » cam xuc, chat xuc, cac cuoc
ma hoi » mai hoi, xa hoi, ma hoa
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) OR (hoc sach)) tu nang ma hoi. hieu ve ((cac xuc) or (cac nuoc)) van thanh dam cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) tu nang ma hoi. hieu ve ((cac xuc) OR (cac nuoc)) van thanh dam cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (hoc sach)) tu nang ma hoi. hieu ve ((cac xuc) or (cac nuoc)) van thanh dam cua tu".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (hoc sach)) tu nang ma hoi. hieu ve ((cac xuc) or (cac nuoc)) van thanh dam cua tu*.