Perhaps you should try some spelling variations:
truoc ban » truoc bang, thuoc ban, truc ban
lam truoc » lam thuoc, nam truoc, lam truong
cua viet » ca viet, cua vat, cua dieu
hang cau » hang dau, hang ca, nhung cau
thanh va » thanh van, hanh va, thanh ha
so sanh » do sanh
hieu ve » hieu va, hieu van
sanh y » sinh y, anh y, hanh y
ve lam » va lam, de lam, se lam
y hang » ly hang, ty hang, yu hang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh y hang cau hoi. hieu ve lam truoc ban ((hanh vi) or (thanh va)) ((cua viet) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh y hang cau hoi. hieu ve lam truoc ban ((hanh vi) OR (thanh va)) ((cua viet) OR (hoa viet)).
• Adding a wildcard symbol may retrieve word variants: so sanh y hang cau hoi. hieu ve lam truoc ban ((hanh vi) or (thanh va)) ((cua viet) or (hoa viet))*.