Perhaps you should try some spelling variations:
duong trong » dung trong
thanh tung » thanh cong
trong tan » trong quan, trong cac, trong ca
theo chu » theo chieu, cho chu, chao chu
doc hieu » toc thieu, hoc thieu, hoc hien
va duong » van duong, va tuong, va huong
than cau » toan cau, phan cau, than cap
toan cao » toan ban, toan tap
tung va » trung va, tuong va, dung va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chu) or (doc hieu)) sach - thanh tung va duong trong tan ((than cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chu) OR (doc hieu)) sach - thanh tung va duong trong tan ((than cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: ((theo chu) or (doc hieu)) sach - thanh tung va duong trong tan ((than cau) or (toan cao))*.