Perhaps you should try some spelling variations:
hanh doanh » hang doanh, chinh doanh, doanh doanh
doanh luan » doanh nhan
luan dung » lan dung, luan dong, luan hung
dung cong » dung trong
doc hieu » hoc thieu, hoc hien
cong tac » cong ty
tac chan » tac chuan, tac can, tac chon
chan ta » chan tha, nhan tai, nhan tao

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 (toc thieu)) xanh - hanh doanh luan dung cong tac chan ta~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) OR (toc thieu)) xanh - hanh doanh luan dung cong tac chan ta".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) OR (toc thieu)) xanh - hanh doanh luan dung cong tac chan ta*.