Perhaps you should try some spelling variations:
thanh tung » thanh cong
dung cong » dung trong
tan thanh » tran thanh, tang thanh, toan thanh
chao chu » cho chu, cua chu, cao cho
chu sach » cau sach, thu sach, chieu sach
tac dung » sach dung, xay dung, tin dung
tan than » tan tran, ban than, tam than

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

• Performing a fuzzy search may retrieve terms with similar spellings: chao chu sach - ((thanh trung) or (thanh tung)) tac dung cong ((tan than) OR (tan thanh)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: chao chu sach - ((thanh trung) OR (thanh tung)) tac dung cong ((tan than) OR (tan thanh)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "chao chu sach - ((thanh trung) or (thanh tung)) tac dung cong ((tan than) OR (tan thanh)) cau".
• Adding a wildcard symbol may retrieve word variants: chao chu sach - ((thanh trung) or (thanh tung)) tac dung cong ((tan than) OR (tan thanh)) cau*.