Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
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
cua nhung » va nhung
cong tap » cuong tap, cong tac, cong tan
toan cao » toan tap
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 tap ((toan cao) OR (toan ban))~.
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - hanh trinh cua nhung cong tap ((toan cao) or (toan ban))*.