Perhaps you should try some spelling variations:
luan chung » luan chinh
quan nhung » qua nhung, cua nhung, quang hung
tinh sang » tinh quang, tinh trang, trinh san
theo chu » theo chieu, cho chu, chao chu
chu tinh » chau tinh, chua tinh, cuu tinh
tinh san » trinh san, tinh son, sinh san
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap

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 tinh - ((tinh san) or (tinh sang)) ((quan nhung) or (luan chung)) cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu tinh - ((tinh san) OR (tinh sang)) ((quan nhung) OR (luan chung)) cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: theo chu tinh - ((tinh san) or (tinh sang)) ((quan nhung) or (luan chung)) cong tac toan cau*.