Perhaps you should try some spelling variations:
quan thanh » van thanh
hanh tranh » canh tranh, hanh trinh, hanh trang
thong cong » trong cong, tong cong, thong thong
ban thanh » ban hanh, ban hang
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
cong san » cong tac
toan cau » toan cao, toan tap, toan tai
toan ban » van 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 ((quan thanh) or (ban thanh)) - hanh tranh cua thong cong san ((toan cau) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((quan thanh) OR (ban thanh)) - hanh tranh cua thong cong san ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((quan thanh) or (ban thanh)) - hanh tranh cua thong cong san ((toan cau) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc ((quan thanh) or (ban thanh)) - hanh tranh cua thong cong san ((toan cau) OR (toan ban))*.