Perhaps you should try some spelling variations:
hanh doanh » hang doanh, chinh doanh, doanh doanh
doanh cua » doanh luan
doc hieu » toc thieu, hoc thieu
cua dung » cua dang, cua dong, qua dung
cong van » cong vang, cong san, cong tan
song van » hoang van, trong van, duong van
tuan cau » toan cau, quan cau, tuan cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (hoc hien)) manh - hanh doanh cua dung ((cong van) OR (song van)) tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc hien)) manh - hanh doanh cua dung ((cong van) OR (song van)) tuan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (hoc hien)) manh - hanh doanh cua dung ((cong van) OR (song van)) tuan cau".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc hien)) manh - hanh doanh cua dung ((cong van) OR (song van)) tuan cau*.