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 cua » tinh cua, trinh luat, trinh quan
nhung don » nhung van, nhung bo
dang cong » dung cong
dan toan » van toan, dan than, manh toan
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: nho ((nhieu tang) or (hieu lang)) - hanh trinh cua ((nhung don) or (dang cong)) dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nho ((nhieu tang) OR (hieu lang)) - hanh trinh cua ((nhung don) OR (dang cong)) dan toan cau.
• Adding a wildcard symbol may retrieve word variants: nho ((nhieu tang) or (hieu lang)) - hanh trinh cua ((nhung don) or (dang cong)) dan toan cau*.