Perhaps you should try some spelling variations:
hai chau » lai chau, ha chau, hat chau
van manh » van minh, van anh, van hanh
hieu van » hieu va, thien van, lieu va
mai hoi » mai khoi, dai hoi, lai hoi
sach ly » sach y, sach lo, sach ty
nam tuc » nam thuc, nam truc, nam tu
tuc van » thuc van, truc van, tuc va
hai cau » hai chu, hai hau, hoi cau
ly nang » ky nang, ly hang, ly vang
su sach » so sach, vu sach
ma hoi » xa hoi, ma hoa, me hoi

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 ly nang ((ma hoi) or (mai hoi)). hieu van nam tuc van manh ((hai cau) OR (hai chau)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly nang ((ma hoi) OR (mai hoi)). hieu van nam tuc van manh ((hai cau) OR (hai chau)) tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ly nang ((ma hoi) or (mai hoi)). hieu van nam tuc van manh ((hai cau) OR (hai chau)) tren".
• Adding a wildcard symbol may retrieve word variants: su sach ly nang ((ma hoi) or (mai hoi)). hieu van nam tuc van manh ((hai cau) OR (hai chau)) tren*.