Perhaps you should try some spelling variations:
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 can » cong san, cong tan, cong dan
chan cau » can cau, chinh cau, nhanh cau
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien tinh - canh tranh cua hang cong can ((chan cau) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien tinh - canh tranh cua hang cong can ((chan cau) OR (phan cau)).
• Adding a wildcard symbol may retrieve word variants: hoc hien tinh - canh tranh cua hang cong can ((chan cau) or (phan cau))*.