Perhaps you should try some spelling variations:
hanh dung » thanh dung, anh dung, hanh dong
luan tang » luan nang, lan tang, xuan trang
manh toan » thanh toan, anh tuan, tinh toan
theo chu » theo chieu, cho chu, chao chu
chu xanh » chu manh, chieu xanh, chua xang
luon ung » luan ung, luoc ung, luon suong
dan toan » van toan, dan than, xuan toan

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 dung ((luan tang) OR (luon ung)) huong ((dan toan) OR (manh toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu xanh - hanh dung ((luan tang) or (luon ung)) huong ((dan toan) OR (manh toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: theo chu xanh - hanh dung ((luan tang) or (luon ung)) huong ((dan toan) OR (manh toan)) cau*.