Perhaps you should try some spelling variations:
doanh cua » doanh luan
hang cong » dang cong, hang nong, bang cong
dan thanh » dang thanh, danh thanh, ban thanh
cong dan » cong san, cong tan, huong dan
thanh tu » hanh tu, nhanh tu, thanh tung
hoc thi » hoc thai, hoc tai, hoc chi
ban cua » ban quan

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 dan thanh 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 dan thanh tu.
• Adding a wildcard symbol may retrieve word variants: hoc thi thanh - hanh ((doanh cua) or (ban cua)) hang cong dan thanh tu*.