Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thanh tran » thanh trang, thanh toan, thanh tra
tuan dung » tuan duong, tran dung, tuan dang
chu sach » cau sach, thu sach, chieu sach
tan dung » tran dung, tin dung, van dung
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau

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 (thuoc sach)) - thanh tran ((tuan dung) OR (tan dung)) cong dan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu sach) OR (thuoc sach)) - thanh tran ((tuan dung) OR (tan dung)) cong dan chan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu sach) or (thuoc sach)) - thanh tran ((tuan dung) OR (tan dung)) cong dan chan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chu sach) or (thuoc sach)) - thanh tran ((tuan dung) OR (tan dung)) cong dan chan cau*.