Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
tang huong » tang cuong, tang duong, hang thuong
ho chieu » theo chieu, hoc thieu, doi chieu
cong san » cong tac
dong hoc » dong co, dong luc
dan phan » doan phan, dan chan, van phan
phan cau » phan dau, phan cac, phan tu

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

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