Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu manh » chieu xanh, hieu nganh, hien hanh
tranh cua » doanh cua, manh cua
hang cong » dang cong, hang nong, bang cong
cua hang » cua dang, cua nhung, cua cong
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu manh) OR (dieu hanh)) - hanh tranh cua hang cong tan ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (dieu hanh)) - hanh tranh cua hang cong tan ((toan cau) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) OR (dieu hanh)) - hanh tranh cua hang cong tan ((toan cau) or (toan tap))".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) OR (dieu hanh)) - hanh tranh cua hang cong tan ((toan cau) or (toan tap))*.