Perhaps you should try some spelling variations:
hien hanh » dieu hanh
tranh cua » doanh cua, manh cua
thanh cao » thanh cac, thanh thao, thanh cham
hien anh » thien anh, dien anh, tien anh
ban cong » bang cong, van cong, phan cong
cong san » cong tac
thanh ca » thanh cha, thanh cac, thanh ha

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 anh) OR (hien hanh)) - canh tranh cua ban cong san ((thanh cao) or (thanh ca))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien anh) OR (hien hanh)) - canh tranh cua ban cong san ((thanh cao) OR (thanh ca))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien anh) OR (hien hanh)) - canh tranh cua ban cong san ((thanh cao) or (thanh ca))*".