Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
van thanh » ban thanh, van tuan
toc sach » hoc sach, doc sach, thuoc sach
cao duc » dao duc, cao suc, giao duc
cam duc » cam xuc, pham duc, nam duoc
ly nang » ky nang, ly hang, ly vang
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
ma hoi » mai hoi, xa hoi, ma hoa
cuc » cuoc, chuc
thue » thu, thuc, thuy

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (toc sach)) ly nang ma hoi. hieu ve ((cam duc) or (cao duc)) van thanh tai cuc thue~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ly nang ma hoi. hieu ve ((cam duc) OR (cao duc)) van thanh tai cuc thue.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ly nang ma hoi. hieu ve ((cam duc) or (cao duc)) van thanh tai cuc thue*.