Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
nhieu tang » chieu sang, nhiet nang
hieu lang » chieu sang, hieu quang, hieu van
trinh qua » trinh quan, trinh cua, trinh quang
qua duong » quan duong, qua dung, qua dong
cong dan » cong san, cong tan, huong dan
cong tac » cong ty
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoi ((hieu lang) or (nhieu tang)) - hanh trinh qua duong ((cong dan) or (cong tac)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi ((hieu lang) OR (nhieu tang)) - hanh trinh qua duong ((cong dan) OR (cong tac)) toan cau.
• Adding a wildcard symbol may retrieve word variants: hoi ((hieu lang) or (nhieu tang)) - hanh trinh qua duong ((cong dan) or (cong tac)) toan cau*.