Perhaps you should try some spelling variations:
trinh toan » tinh toan, thanh toan, trinh han
dung cong » dung trong
chao chu » cho chu, cua chu, cao cho
hanh ban » thanh ban, hanh san, hanh han
hang ban » hang luan, hang va, hang tai
cua dung » cua dang, cua dong, qua dung
toan cau » toan cao, toan ban, toan tap

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: ((chao chu) OR (sua chua)) manh - ((hanh ban) OR (hang ban)) cua dung cong trinh toan cau~.
• Adding a wildcard symbol may retrieve word variants: ((chao chu) or (sua chua)) manh - ((hanh ban) or (hang ban)) cua dung cong trinh toan cau*.