Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thu sach » tu sach, thuat sach, thuoc sach
va kinh » va tinh, qua kinh
va dinh » van dinh, va tinh, vu dinh
nam xuc » cam xuc, nam xua, nam thuc
tu cach » tu cac
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
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: ((tu cach) or (thu sach)) ky tang ma hoi. hieu van nam xuc ((va dinh) or (va kinh)) dai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (thu sach)) ky tang ma hoi. hieu van nam xuc ((va dinh) OR (va kinh)) dai cua tu.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (thu sach)) ky tang ma hoi. hieu van nam xuc ((va dinh) or (va kinh)) dai cua tu*.