Perhaps you should try some spelling variations:
ban thanh » ban hang
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
cam cuc » cam xuc, cham cuu, pham cuc
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
van hoi » van hoa, van hoc, van hoe
ve cam » ve cham, ve cac, va cam

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 ((7 tang) OR (6 tang)) van hoi. hieu ve cam cuc ((ban thanh) or (ban hanh)) dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((7 tang) OR (6 tang)) van hoi. hieu ve cam cuc ((ban thanh) OR (ban hanh)) dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((7 tang) OR (6 tang)) van hoi. hieu ve cam cuc ((ban thanh) or (ban hanh)) dai cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((7 tang) OR (6 tang)) van hoi. hieu ve cam cuc ((ban thanh) or (ban hanh)) dai cua triet*.