Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
hien hach » thien hach, hien hanh, hien nhanh
tranh van » tran van, trinh van, thanh van
hang cong » dang cong, hang nong, bang cong
van hang » van khang, van hoang, van thang
ban than » ban thanh, van thanh, ban hang
van chat » cao chat
van than » van thanh, van thang, van tuan

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: hoc hien hach - hanh tranh van hang cong ((((ban than) OR (van chat))) OR (van than)) cau~.
• Adding a wildcard symbol may retrieve word variants: hoc hien hach - hanh tranh van hang cong ((((ban than) or (van chat))) or (van than)) cau*.