Perhaps you should try some spelling variations:
dung phuong » dung thuong, bang phuong, dung chung
thanh trung » thanh tung
trung hoc » trung quoc
chu xanh » chu manh, chieu xanh, chua xang
hoc dung » hoc ung, hoc dan, tac dung
ban toan » ban than, van toan, bao toan
bai toan » bai tap
cho chu » cho thue

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

• Performing a fuzzy search may retrieve terms with similar spellings: cho chu xanh - thanh trung hoc dung phuong ((ban toan) or (bai toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cho chu xanh - thanh trung hoc dung phuong ((ban toan) OR (bai toan)) cao.
• Adding a wildcard symbol may retrieve word variants: cho chu xanh - thanh trung hoc dung phuong ((ban toan) or (bai toan)) cao*.