Perhaps you should try some spelling variations:
trinh toan » tinh toan, thanh toan, trinh quan
hanh dung » thanh dung, anh dung, hanh dong
luan dang » luan nang, luan danh, luan dong
dang cong » dung cong
trinh han » trinh quan
theo chu » theo chieu, cho chu, chao chu
chu xanh » chu manh, chieu xanh, chua xang

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 dang cong ((trinh toan) OR (trinh han)) cau~.
• Adding a wildcard symbol may retrieve word variants: theo chu xanh - hanh dung luan dang cong ((trinh toan) or (trinh han)) cau*.