Perhaps you should try some spelling variations:
hanh tranh » hanh trinh, hanh trang, lanh tranh
chi xanh » chi anh, chi danh, chi hanh
van cong » van dong, van phong, phan cong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap
doi chi » doi khi
van van » van ban, tan van, san van

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - ((hanh tranh) OR (canh tranh)) van van cong dan than cao~.
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - ((hanh tranh) or (canh tranh)) van van cong dan than cao*.