Perhaps you should try some spelling variations:
thanh trung » thanh tung
cong thanh » dong thanh, cong trinh, cong tan
thanh than » thanh thanh, thanh thang, thanh toan
tieu sach » chieu sach, dien sach, te sach
cap hang » cap hoang, cap bang, cau thang
than cau » toan cau, phan cau, than cap
cap han » cap phan, cap can, cap hay

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