Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu tinh » trieu tinh, lieu tinh, chau tinh
hieu lang » chieu sang, hieu quang, nhieu tang
tranh va » tranh van, trang va, trinh va
dan toan » van toan, dan than, manh toan
van tuan » van quan, van ban, anh tuan

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

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