Perhaps you should try some spelling variations:
nhieu tang » chieu sang, nhiet nang
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, hieu van
tinh son » tinh toan, dinh so, tinh hoc
dan toan » dan than, manh toan, xuan toan
van toan » van tuan, van tan, van thanh
son va » song va, son la, lon va

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

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