Perhaps you should try some spelling variations:
doanh cua » doanh luan
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
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
va hanh » van hanh, va danh, ban hanh
cua te » cua tu

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 ky nang xa hoi. hieu qua cac tuc ((va hanh) OR (va thanh)) doanh cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang xa hoi. hieu qua cac tuc ((va hanh) OR (va thanh)) doanh cua te".
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang xa hoi. hieu qua cac tuc ((va hanh) OR (va thanh)) doanh cua te*.