Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
chi xanh » chi anh, chi danh, chi hanh
van toan » van tuan, van tan, van thanh
toan cao » toan ban, toan tap
doi chi » doi khi

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 cua ((((trong cong) OR (hang cong))) OR (dang cong)) van toan cao~.
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - hanh tranh cua ((((trong cong) or (hang cong))) or (dang cong)) van toan cao*.