Perhaps you should try some spelling variations:
cam truc » cau truc, nam truc, lam truoc
lai cua » dai cua, hai cua, lai chau
hoi cua » hoi chuc
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
su sach » so sach, vu sach
qua cam » qua cham, qua cac, qua ca
sach v » sach va, sach y, sach 2
ma hoi » mai hoi, ma hoa, me hoi
v nang » va nang, vu nang, van nang

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 v nang ((ma hoi) OR (xa hoi)). hieu qua cam truc va hanh ((hoi cua) or (lai cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach v nang ((ma hoi) OR (xa hoi)). hieu qua cam truc va hanh ((hoi cua) OR (lai cua)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach v nang ((ma hoi) OR (xa hoi)). hieu qua cam truc va hanh ((hoi cua) or (lai cua)) viet".
• Adding a wildcard symbol may retrieve word variants: su sach v nang ((ma hoi) OR (xa hoi)). hieu qua cam truc va hanh ((hoi cua) or (lai cua)) viet*.