Perhaps you should try some spelling variations:
thieu tinh » chieu tinh, thien tinh, lieu tinh
doanh quan » doanh quang, doanh luan, doanh nhan
nhung cong » dung cong, thong cong, hang cong
doan quan » doan quang, dan quan, toan quan
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu tinh) OR (trieu tinh)) - chinh ((doanh quan) or (doan quan)) nhung cong san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu tinh) OR (trieu tinh)) - chinh ((doanh quan) OR (doan quan)) nhung cong san toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu tinh) OR (trieu tinh)) - chinh ((doanh quan) or (doan quan)) nhung cong san toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu tinh) OR (trieu tinh)) - chinh ((doanh quan) or (doan quan)) nhung cong san toan cao*.