Perhaps you should try some spelling variations:
thien van » thi van
cam truc » cau truc, nam truc, lam truoc
hai chu » hai chau, hoi chu, hai chi
hai cau » hai chau, hai hau, hoi cau
va danh » va dinh, va dan, va hanh
truc va » thuc va, thuc vat, trung va
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
mai hoi » mai khoi, dai hoi, lai hoi
van cam » van nam, van lam, van cau
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 ky nang ((ma hoi) or (mai hoi)). thien van cam truc va danh ((hai cau) OR (hai chu)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((ma hoi) OR (mai hoi)). thien van cam truc va danh ((hai cau) OR (hai chu)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ((ma hoi) or (mai hoi)). thien van cam truc va danh ((hai cau) OR (hai chu)) triet*".