Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
thu hang » thi hang, thuc hanh, thu huong
hanh vai » hanh vi, hanh va, hanh tai
sach thu » sach thue, sach thieu, sach tham
cua tre » cua te, cuu tre, dua tren
su sach » so sach, vu sach
duc ban » duc tan, duc van, dua ban
van cam » van nam, van cau, van dam
hang xa » hoang xa, hang va, hang ca
van lam » van nam

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