Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu xanh » chieu xanh, hieu manh, hieu nganh
van thang » van thanh, van khang, van hang
doc hieu » toc thieu, hoc thieu, hoc hien
tranh va » tranh van, trang va, trinh va
dan than » dan chan, ban than, dan toan
van than » van thanh, van tuan, van phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu xanh - canh tranh va nhung cong ((dan than) or (((van than) OR (van thang)))) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - canh tranh va nhung cong ((dan than) OR (((van than) OR (van thang)))) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - canh tranh va nhung cong ((dan than) or (((van than) OR (van thang)))) cau".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - canh tranh va nhung cong ((dan than) or (((van than) OR (van thang)))) cau*.