Perhaps you should try some spelling variations:
cham truc » cau truc, nham thuc, pham thuc
nang dai » nang dau, nang tai, lang dai
qua cham » qua hai, qua cac, va cham
truc van » truc va, thuc van, truc ban
van hanh » van thanh, ban hanh, van anh
hanh vai » hanh vi, hanh va, hanh tai
cua viet » ca viet, cua vat, cua dieu
so sach » so sanh, bo sach, co sach
dai hoi » dai hoc, dai hai, dai moi
sach v » sach va, sach y, sach 2
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: so sach v nang dai hoi. hieu qua cham truc van hanh vai ((cua viet) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach v nang dai hoi. hieu qua cham truc van hanh vai ((cua viet) OR (hoa viet)).
• Adding a wildcard symbol may retrieve word variants: so sach v nang dai hoi. hieu qua cham truc van hanh vai ((cua viet) or (hoa viet))*.