Perhaps you should try some spelling variations:
thanh truong » thanh trung, thanh thuong, thanh tung
chao chu » cho chu, cua chu, cao cho
chu xanh » chu manh, chieu xanh, chua xang
vat dung » van dung, viet dung, mat duong
ban toan » ban than, van toan, bao toan
bai toan » bai tap
va dung » van dung, va duong, va ung

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

• Performing a fuzzy search may retrieve terms with similar spellings: chao chu xanh - thanh truong ((va dung) or (vat dung)) cong ((ban toan) OR (bai toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: chao chu xanh - thanh truong ((va dung) OR (vat dung)) cong ((ban toan) OR (bai toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "chao chu xanh - thanh truong ((va dung) or (vat dung)) cong ((ban toan) OR (bai toan)) cao".
• Adding a wildcard symbol may retrieve word variants: chao chu xanh - thanh truong ((va dung) or (vat dung)) cong ((ban toan) OR (bai toan)) cao*.