Perhaps you should try some spelling variations:
thanh trung » thanh tung
hanh tung » thanh tung, manh tung, hanh dung
dung cong » dung trong
theo chu » theo chieu, cho chu, chao chu
cong san » cong tac
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap
chu van » cuu van, chu han

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 van - ((hanh tung) OR (thanh trung)) su dung cong san ((toan cau) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu van - ((hanh tung) or (thanh trung)) su dung cong san ((toan cau) OR (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: theo chu van - ((hanh tung) or (thanh trung)) su dung cong san ((toan cau) OR (toan cao))*.