Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung tan » trung tuan, trung tran, trung tang
dung cong » dung trong
chu sach » cau sach, thu sach, chieu sach
hau sach » khau sach, cau sach, ham sach
tan dung » tran dung, tin dung, van dung
cong san » cong tac
san than » sang than, san thanh, ban than
than cau » toan cau, phan cau, than cap

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