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
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan tap » toan ban
toan cao » toan ban
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - hanh trinh cua thong ((cong dan) OR (cong san)) ((toan tap) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh trinh cua thong ((cong dan) OR (cong san)) ((toan tap) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - hanh trinh cua thong ((cong dan) OR (cong san)) ((toan tap) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh trinh cua thong ((cong dan) OR (cong san)) ((toan tap) or (toan cao))*.