Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
quang hang » quang hoang, quang khang, quang thang
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tinh » nhanh tinh, thanh tinh, canh tinh
hang cong » dang cong, hang nong, bang cong
cong san » cong tac
toan cau » toan cao, toan ban, toan tai
toan tap » 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 tinh) or (hanh trinh)) quang hang cong san ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - ((hanh tinh) OR (hanh trinh)) quang hang cong san ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - ((hanh tinh) or (hanh trinh)) quang hang cong san ((toan cau) or (toan tap))*.