Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh trinh » canh tranh, hanh chinh
trinh phap » trinh phan, trinh han, trinh chat
doi chieu » doc hieu, doi chi, ho chieu
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cao » toan ban, toan tap

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 phap nang ((cong dan) or (cong san)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu tinh - hanh trinh phap nang ((cong dan) OR (cong san)) toan cao.
• Adding a wildcard symbol may retrieve word variants: doi chieu tinh - hanh trinh phap nang ((cong dan) or (cong san)) toan cao*.