Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
cam truc » cau truc, nam truc, lam truoc
su sach » so sach
vu sach » vu bach, vu khach
qua cam » qua cham, qua cac, qua ca
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
va cau » van cau, va cac, va dau
x hoi » xa hoi, o hoi, x ho

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) or (vu sach)) ky nang x hoi. hieu qua cam truc va hanh va cau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky nang x hoi. hieu qua cam truc va hanh va cau triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky nang x hoi. hieu qua cam truc va hanh va cau triet*.