Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
dung cong » dung trong
van thanh » ban thanh, van tuan
ho chieu » theo chieu, hoc thieu, doi chieu
tan toan » tan tran, tap toan, van toan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu tinh - hanh tranh cua ((trong cong) OR (dung cong)) ((tan toan) OR (van thanh)) cau~.
• Adding a wildcard symbol may retrieve word variants: ho chieu tinh - hanh tranh cua ((trong cong) or (dung cong)) ((tan toan) or (van thanh)) cau*.