Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
toc sach » hoc sach, doc sach, thuoc sach
thanh vi » hanh vi, thanh va, thanh ve
hoc cac » hoc cao
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cac dac » cac dan, cac dai, cac bac
dac ban » cac ban, dac san, duc ban
cua chu » sua chua
ve cac » va cac, vien cac
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (hoc cac)) ky nang xa hoi. hieu ve cac dac ban thanh vi ((cua su) or (cua chu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc cac)) ky nang xa hoi. hieu ve cac dac ban thanh vi ((cua su) OR (cua chu)).
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc cac)) ky nang xa hoi. hieu ve cac dac ban thanh vi ((cua su) or (cua chu))*.