Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
va hanh » van hanh, va thanh, va danh
cau xuc » cam xuc, cau luc, cau truc
van cau » van dau, van hau, van chat
tang ma » mang may, tang van
nang xa » nang x, lang xa, nang ma
sac ky » cac ky, sai ky
vai va » mai va, dai va, hai va
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky ((nang xa) or (tang ma)) hoi. hieu van cau xuc ((va hanh) or (ban hanh)) vai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang xa) OR (tang ma)) hoi. hieu van cau xuc ((va hanh) OR (ban hanh)) vai va triet.
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang xa) or (tang ma)) hoi. hieu van cau xuc ((va hanh) or (ban hanh)) vai va triet*.