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