Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc chieu » hoc thieu, ho chieu, hoc hien
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
thanh cac » hanh cac, thanh bac, thanh ca
cong san » cong tac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu tinh - hanh tranh cua thong ((cong san) or (huong dan)) ((thanh cac) or (thanh san))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu tinh - hanh tranh cua thong ((cong san) OR (huong dan)) ((thanh cac) OR (thanh san)).
• Adding a wildcard symbol may retrieve word variants: hoc chieu tinh - hanh tranh cua thong ((cong san) or (huong dan)) ((thanh cac) or (thanh san))*.