Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
va thanh » gia thanh, ban thanh, va tinh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
cac tuc » cac toc, cac tu, cac tac
cua tuc » cua duc, cua tu, cua thuoc
hieu ve » hieu va, hieu van
ky dang » ky nang, ky danh
tuc va » thuc va, truc va, tuc xa
ma hoi » mai hoi, ma hoa, me hoi
ve cac » va cac, vien cac

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 ky dang ((ma hoi) or (xa hoi)). hieu ve cac tuc va thanh tai ((cua tre) or (cua tuc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky dang ((ma hoi) OR (xa hoi)). hieu ve cac tuc va thanh tai ((cua tre) OR (cua tuc)).
• Adding a wildcard symbol may retrieve word variants: te sach ky dang ((ma hoi) or (xa hoi)). hieu ve cac tuc va thanh tai ((cua tre) or (cua tuc))*.