Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
hanh doanh » hang doanh, chinh doanh, kinh doanh
trinh quan » tinh quang, trinh luat, trinh han
doc trieu » dong trieu, toc thieu, hoc thieu
luan hung » luan chung, lan hung, luan ung
hung cong » nhung cong, hung cuong, phung cong
doc hieu » toc thieu, hoc thieu, hoc hien
quan cau » quang cao, toan cau, quan ha

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

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