Perhaps you should try some spelling variations:
doanh quang » doan quang, doanh luan, nhanh quang
doanh quan » doanh luan, doan quan, doanh nhan
nhung cong » dung cong, thong cong, hang cong
cong tan » cong tac, cong san, cong thanh
toan cao » toan ban
toan tap » toan ban
ha tinh » va tinh, may tinh
hoc ha » hoc hoa, hoc hai, hoc hat

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ha tinh - hanh ((doanh quan) or (doanh quang)) nhung cong tan ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ha tinh - hanh ((doanh quan) OR (doanh quang)) nhung cong tan ((toan cao) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc ha tinh - hanh ((doanh quan) or (doanh quang)) nhung cong tan ((toan cao) or (toan tap))*.