Perhaps you should try some spelling variations:
ban thanh » ban hang
va triet » va thiet, va trien, ve triet
cham duc » pham duc, cham soc, pham duy
ban hanh » ban hang
kho tang » cao tang
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
tang xa » trang xa, tang ma, lang xa
su sach » so sach, vu sach
hai va » hai van, thai va, hoi va
su sac » su cac, su xac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sac) or (su sach)) kho tang xa hoi. hieu ve cham duc ((ban thanh) or (ban hanh)) hai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su sach)) kho tang xa hoi. hieu ve cham duc ((ban thanh) OR (ban hanh)) hai va triet.
• Adding a wildcard symbol may retrieve word variants: ((su sac) or (su sach)) kho tang xa hoi. hieu ve cham duc ((ban thanh) or (ban hanh)) hai va triet*.