Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
hien tinh » khien tinh, thien tinh, bien tinh
tranh cua » doanh cua, manh cua
hang cong » dang cong, hang nong, bang cong
cua hang » cua dang, cua nhung, cua cong
cong dan » cong san, cong tan, huong dan
than ban » thanh ban, toan ban, than man

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 tinh - hanh tranh cua hang cong dan ((than ban) OR (thanh san))~.
• Adding a wildcard symbol may retrieve word variants: hoc hien tinh - hanh tranh cua hang cong dan ((than ban) or (thanh san))*.