Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
nhung cong » thong cong, hang cong, nhung don
dung cong » dung trong
chi xanh » chi anh, chi danh, chi hanh
doi chi » doi khi
van tan » van tuan, van ban, van tai
tan cao » toan cao, tao cao, tay cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi xanh - ((hanh trinh) or (canh tranh)) va ((nhung cong) or (dung cong)) van tan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - ((hanh trinh) OR (canh tranh)) va ((nhung cong) OR (dung cong)) van tan cao.
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - ((hanh trinh) or (canh tranh)) va ((nhung cong) or (dung cong)) van tan cao*.