Perhaps you should try some spelling variations:
doanh cua » doanh luan
hang cong » dang cong, hang nong, bang cong
cong dang » cong dong, cong dan, cong dung
dang hanh » dang thanh, ban hanh, dang van
hoc thi » hoc thai, hoc tai, hoc chi
ban cua » ban quan
hanh tu » anh tu, danh tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thi thanh - hanh ((doanh cua) or (ban cua)) hang cong dang hanh tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thi thanh - hanh ((doanh cua) OR (ban cua)) hang cong dang hanh tu.
• Adding a wildcard symbol may retrieve word variants: hoc thi thanh - hanh ((doanh cua) or (ban cua)) hang cong dang hanh tu*.