Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
van cam » van nam, van lam, van cau
cam tuc » cam xuc, cam tu, nam thuc
va danh » va dinh, va dan, va hanh
hai cau » hai chau, hai chu, hoi cau
hai hau » hai chau, dai hau, hai hai
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang ma hoi. hieu van cam tuc va danh ((hai cau) OR (hai hau)) treo~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ma hoi. hieu van cam tuc va danh ((hai cau) OR (hai hau)) treo".
• Adding a wildcard symbol may retrieve word variants: su sach y nang ma hoi. hieu van cam tuc va danh ((hai cau) OR (hai hau)) treo*.