Perhaps you should try some spelling variations:
dung phuong » dung thuong, bang phuong, dung chung
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
trung cao » truong cao, trung cap, trung co
cao dung » cao dang, cao dong, cao ung
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca, van chat

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - thanh trung cao dung phuong ((dan than) or (dan chan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh trung cao dung phuong ((dan than) OR (dan chan)) cau.
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh trung cao dung phuong ((dan than) or (dan chan)) cau*.