Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hanh tranh » canh tranh, hanh trang, lanh tranh
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
cong cong » cong dong, trong cong, dung cong
cong tan » cong tac, cong san, cong thanh
toan cao » toan tap
toan ban » van ban

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

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