Perhaps you should try some spelling variations:
lam truoc » lam thuoc, nam truoc, lam truong
truoc ban » truoc bang, thuoc ban, truc ban
thanh vi » hanh vi, thanh va, nhanh vi
cua viet » ca viet, cua vat, cua dieu
nang cau » nang cao, hang cau, nang dau
thanh ve » hanh ve, thanh va, thanh vien
so sach » so sanh, bo sach, co sach
hieu ve » hieu va, hieu van
sach v » sach va, sach y, sach 2
ve lam » va lam, de lam, se lam
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 cau hoi. hieu ve lam truoc ban ((thanh vi) or (thanh ve)) ((cua viet) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach v nang cau hoi. hieu ve lam truoc ban ((thanh vi) OR (thanh ve)) ((cua viet) OR (hoa viet)).
• Adding a wildcard symbol may retrieve word variants: so sach v nang cau hoi. hieu ve lam truoc ban ((thanh vi) or (thanh ve)) ((cua viet) or (hoa viet))*.