Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hanh hang » thanh hang, hang hang, hanh han
dung cong » dung trong
theo chu » theo chieu, cho chu, chao chu
chu xanh » chu manh, chieu xanh, chua xang
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca, van chat

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu xanh - hanh hang va ((dung cong) OR (thong cong)) ((dan than) OR (dan chan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu xanh - hanh hang va ((dung cong) or (thong cong)) ((dan than) OR (dan chan)) cau~".
• Adding a wildcard symbol may retrieve word variants: theo chu xanh - hanh hang va ((dung cong) or (thong cong)) ((dan than) OR (dan chan)) cau*.