Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
hanh trinh » canh tranh, hanh chinh
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
trinh cua » tinh cua, trinh luat, trinh quan
hang cong » dang cong, hang nong, bang cong
toan ban » van ban

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

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