Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, viet sach
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau
te sach » toc sach
tung ap » tung dan, tung bay, tung mai
tang ap » tang van, tang tai, tang dan

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

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