Perhaps you should try some spelling variations:
doanh luan » doanh nhan
hoc thieu » toc thieu, hoc hien
cong dung » cuong dung, cong dong, cong luong
doc hieu » toc thieu, hoc hien
dung dan » dung dat, dung san, tung dan
dan toan » van toan, dan than, manh toan
toan tap » toan ban

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 thieu)) lang - hanh ((doanh cua) or (doanh luan)) cong dung dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc thieu)) lang - hanh ((doanh cua) OR (doanh luan)) cong dung dan toan tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) OR (hoc thieu)) lang - hanh ((doanh cua) or (doanh luan)) cong dung dan toan tap*".