Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh trinh » canh tranh, hanh chinh
doi chieu » doc hieu, doi chi, ho chieu
dong cong » duong cong, dang cong, cong cong
dung cong » dung trong
than cau » toan cau, than cap, thanh chau
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: doi chieu tinh - hanh trinh luat ((dong cong) or (dung cong)) tac ((than cau) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu tinh - hanh trinh luat ((dong cong) OR (dung cong)) tac ((than cau) OR (phan cau)).
• Adding a wildcard symbol may retrieve word variants: doi chieu tinh - hanh trinh luat ((dong cong) or (dung cong)) tac ((than cau) or (phan cau))*.