Perhaps you should try some spelling variations:
tranh luan » trinh luan, trinh luat, doanh luan
cong thanh » dong thanh, cong trinh, cong tan
thanh toan » thanh hoa, thanh san, tinh toan
dang cong » dung cong
theo chu » theo chieu, cho chu, chao chu
chu xanh » chu manh, chieu xanh, chua xang
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu xanh - thanh ((tranh luan) or (tran quang)) dang cong thanh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu xanh - thanh ((tranh luan) OR (tran quang)) dang cong thanh toan ban*.