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
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
dan toan » van toan, dan than, manh toan
van tan » van tuan, van ban, van tai

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

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