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
so sach » so sanh, bo sach, co sach
mai hoi » mai khoi, dai hoi, lai hoi
qua cam » qua cham, qua cac, qua ca
y nang » ky nang, ly nang, v nang
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: so sach y nang ((ma hoi) OR (mai 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: so sach y nang ((ma hoi) OR (mai 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: "so sach y nang ((ma hoi) OR (mai hoi)). hieu qua cam truc va hanh ((hoi cua) or (lai cua)) viet".
• Adding a wildcard symbol may retrieve word variants: so sach y nang ((ma hoi) OR (mai hoi)). hieu qua cam truc va hanh ((hoi cua) or (lai cua)) viet*.