Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu lang » chieu sang, hieu quang, nhieu tang
trinh cua » tinh cua, trinh luat, trinh quan
cua thong » cua thuong, cua khong, cua tong
doi hieu » doi chieu, doc hieu, doi hien
cong dan » cong san, cong tan, huong dan
toan cau » 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 hieu lang - hanh trinh cua thong ((cong dan) or (cong trinh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - hanh trinh cua thong ((cong dan) OR (cong trinh)) toan cau.
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - hanh trinh cua thong ((cong dan) or (cong trinh)) toan cau*.