Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
hieu lang » chieu sang, hieu quang, nhieu tang
quan dung » quang dung, quan duong, qua dung
dung cong » dung trong
cong manh » cong danh, duong manh, cong thanh
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 trinh) or (canh tranh)) quan dung cong manh ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - ((hanh trinh) OR (canh tranh)) quan dung cong manh ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - ((hanh trinh) or (canh tranh)) quan dung cong manh ((toan cau) or (toan tap))*.