Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
qua cac » cua cac
cac tuc » cac toc, cac tu, cac tac
ve cua » le cua, de cua, ve cum
te cua » tue cua, le cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky nang xa hoi. hieu qua cac tuc ((le thanh) or (ban thanh)) ((ve cua) OR (te cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang xa hoi. hieu qua cac tuc ((le thanh) OR (ban thanh)) ((ve cua) OR (te cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang xa hoi. hieu qua cac tuc ((le thanh) or (ban thanh)) ((ve cua) OR (te cua)) triet".
• Adding a wildcard symbol may retrieve word variants: so sach ky nang xa hoi. hieu qua cac tuc ((le thanh) or (ban thanh)) ((ve cua) OR (te cua)) triet*.