Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, truong thanh
hanh tranh » canh tranh, hanh trinh, hanh trang
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
cong tan » cong tac, cong san, cong ty
toan ban » van ban

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "theo hieu lang - hanh tranh cua cong ((cong tan) OR (cong thanh)) toan ban~".
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - hanh tranh cua cong ((cong tan) OR (cong thanh)) toan ban*.