Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
duong cong » dung cong, luong cong, duong trong
tranh cua » doanh cua, manh cua
dong cong » dung cong, dang cong, cong cong
doc hieu » toc thieu, hoc thieu, hoc hien
van than » van thanh, van thang, van tuan
than cao » toan cao, thai cao, than cap
cua chu » sua chua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (cua chu)) xanh - hanh tranh cua ((dong cong) or (duong cong)) van than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (cua chu)) xanh - hanh tranh cua ((dong cong) OR (duong cong)) van than cao.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (cua chu)) xanh - hanh tranh cua ((dong cong) or (duong cong)) van than cao*.