Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
chieu tinh » trieu tinh, lieu tinh, chau tinh
trinh quan » tinh quang, trinh luat, trinh han
quan trong » gian trong
hieu lang » chieu sang, hieu quang, nhieu tang
cong san » cong tac
toan cau » toan cao, toan tap, toan tai
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: ho ((hieu lang) OR (chieu tinh)) - hanh trinh quan trong cong san ((toan cau) OR (toan ban))~.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (chieu tinh)) - hanh trinh quan trong cong san ((toan cau) or (toan ban))*.