Perhaps you should try some spelling variations:
ban thanh » ban hang
hieu van » hieu va, thien van, lieu va
ban hanh » ban hang
so cach » so sach, co cach, loi cach
cach tu » cach thuc
tu nang » tru nang, tu nong, tu nano
nang xa » nang x, lang xa, nang ma
van cac » van hac, van cau, van bac
cac xuc » cam xuc, cac nuoc, chat xuc
vi va » vi van, vai va, vu va
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so cach tu nang xa hoi. hieu van cac xuc ((ban hanh) or (ban thanh)) vi va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so cach tu nang xa hoi. hieu van cac xuc ((ban hanh) OR (ban thanh)) vi va thiet.
• Adding a wildcard symbol may retrieve word variants: so cach tu nang xa hoi. hieu van cac xuc ((ban hanh) or (ban thanh)) vi va thiet*.