Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
bien tinh » bi tinh, yen tinh, diep tinh
trinh cua » tinh cua, trinh luat, trinh quan
hang cong » dang cong, hang nong, bang cong
cua hang » cua dang, cua nhung, cua cong
cong san » cong tac
toan cao » toan ban
toan tap » toan ban
so bien » mot bien

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

• Performing a fuzzy search may retrieve terms with similar spellings: so bien tinh - hanh trinh cua hang cong san ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so bien tinh - hanh trinh cua hang cong san ((toan cao) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: so bien tinh - hanh trinh cua hang cong san ((toan cao) or (toan tap))*.