Perhaps you should try some spelling variations:
ban thanh » ban hang
sach thi » sach thu, sach tai, sach thieu
ban hanh » ban hang
ve triet » va trien, su triet
hieu van » hieu va, thien van, lieu va
thi hang » thi hanh, thi nang, thi hong
van cam » van nam, van lam, van cau
hang xa » hoang xa, hang va, hang ca
cua tre » cua te, cuu tre, cua triet
so sach » so sanh, bo sach, co sach

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 thi hang xa hoi. hieu van cam xuc ((ban thanh) OR (ban hanh)) vai ((cua tre) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thi hang xa hoi. hieu van cam xuc ((ban thanh) OR (ban hanh)) vai ((cua tre) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach thi hang xa hoi. hieu van cam xuc ((ban thanh) OR (ban hanh)) vai ((cua tre) or (ve triet))".
• Adding a wildcard symbol may retrieve word variants: so sach thi hang xa hoi. hieu van cam xuc ((ban thanh) OR (ban hanh)) vai ((cua tre) or (ve triet))*.