Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhung cong » dung cong, thong cong, hang cong
tieu sach » chieu sach, dien sach, te sach
tong cong » trong cong, cong cong, dung cong
trung va » truong va, trang va, trung ha
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - thanh trung va ((nhung cong) or (tong cong)) dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - thanh trung va ((nhung cong) OR (tong cong)) dan toan cao.
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - thanh trung va ((nhung cong) or (tong cong)) dan toan cao*.