Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
van thanh » ban thanh, van tuan
cao duc » dao duc, cao suc, giao duc
cam duc » cam xuc, pham duc, nam duoc
sach ly » sach y, sach lo, sach ty
tu sach » thu sach, su sach, te sach
sang ma » tang ma, sang tao, mang may
nang ma » tang ma, nang cao, mang may
hieu ve » hieu va, hieu van
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: tu sach ly ((nang ma) OR (sang 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: tu sach ly ((nang ma) OR (sang ma)) hoi. hieu ve ((cam duc) OR (cao duc)) van thanh tai cuc thue.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ly ((nang ma) OR (sang ma)) hoi. hieu ve ((cam duc) or (cao duc)) van thanh tai cuc thue".
• Adding a wildcard symbol may retrieve word variants: tu sach ly ((nang ma) OR (sang ma)) hoi. hieu ve ((cam duc) or (cao duc)) van thanh tai cuc thue*.