Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
tuong phan » truong phan, thong phan, huong phan
dung cong » dung trong
dan van » dang van, doan van, dao van
van cau » van dau, van hau, 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 tuong phan ((dung cong) or (trong cong)) dan van cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh tuong phan ((dung cong) OR (trong cong)) dan van cau.
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh tuong phan ((dung cong) or (trong cong)) dan van cau*.