Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung chan » trung phan, trong chan, trung can
tieu sach » chieu sach, dien sach, te sach
chan dung » van dung, dan dung
dung cong » dung trong
cong dan » cong san, cong tan, huong dan
than cau » toan cau, than cap, thanh chau
phan cau » phan dau, phan cac, phan tu

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 chan dung cong dan ((than cau) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - thanh trung chan dung cong dan ((than cau) OR (phan cau)).
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - thanh trung chan dung cong dan ((than cau) or (phan cau))*.