Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
dung cong » dung trong
hang cong » dang cong, hang nong, bang cong
van chat » cao chat
doi thi » doi thoi, do thi, doi khi
chat tu » nhat tu, chai tu, chay tu

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

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