Perhaps you should try some spelling variations:
trinh toan » tinh toan, thanh toan, trinh quan
hanh dung » thanh dung, anh dung, hanh dong
luan hang » luan nang, luan hung, luan tang
trinh han » trinh quan
theo chu » theo chieu, cho chu, chao chu
chu xanh » chu manh, chieu xanh, chua xang
luan han » luan hoan, luan phan, luan van

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