Perhaps you should try some spelling variations:
ban thanh » ban hang
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
tai cua » thai cua, tai cuc, tri cua
so sach » bo sach, co sach, hoc sach
cam cuc » cam xuc, cham cuu, pham cuc
xang xa » lang xa, mang xa, ang xa
so sanh » do sanh
van cam » van nam, van lam, van cau

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) or (so sanh)) ty xang xa hoi. hieu van cam cuc ((ban thanh) or (ban hanh)) tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) ty xang xa hoi. hieu van cam cuc ((ban thanh) OR (ban hanh)) tai cua triet.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (so sanh)) ty xang xa hoi. hieu van cam cuc ((ban thanh) or (ban hanh)) tai cua triet*.