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
nhung don » nhung van, nhung bo
dung cong » dung trong
than cau » toan cau, phan cau, than cap

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 ((nhung don) or (dung cong)) dan ((than cau) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu tinh - hanh tranh cua ((nhung don) OR (dung cong)) dan ((than cau) OR (phan tu)).
• Adding a wildcard symbol may retrieve word variants: hoc chieu tinh - hanh tranh cua ((nhung don) or (dung cong)) dan ((than cau) or (phan tu))*.