Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
doi chieu » doc hieu, doi chi, ho chieu
cap dung » cao dung, chan dung, cach dung
tan toan » tan tran, van toan, dan toan
tap toan » tap doan, tap quan, bai toan
ap dung » xay dung, van dung

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: doi chieu xanh - thanh trung ((cap dung) OR (ap dung)) cong ((tan toan) OR (tap toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - thanh trung ((cap dung) OR (ap dung)) cong ((tan toan) or (tap toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - thanh trung ((cap dung) OR (ap dung)) cong ((tan toan) or (tap toan)) cau*.