Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
ve triet » va trien, su triet
va thanh » gia thanh, va tinh, le thanh
hieu van » hieu va, thien van, lieu va
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
van coc » van hoc, van loc, van co
su can » su van, su cao, tu can
doi ve » moi ve, doi va, noi ve
su cac » tu cac, su cao, eu cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su cac) or (su can)) ky tang xa hoi. hieu van coc luc ((va thanh) OR (ban thanh)) doi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su cac) OR (su can)) ky tang xa hoi. hieu van coc luc ((va thanh) OR (ban thanh)) doi ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su cac) or (su can)) ky tang xa hoi. hieu van coc luc ((va thanh) OR (ban thanh)) doi ve triet".
• Adding a wildcard symbol may retrieve word variants: ((su cac) or (su can)) ky tang xa hoi. hieu van coc luc ((va thanh) OR (ban thanh)) doi ve triet*.