Perhaps you should try some spelling variations:
trung quan » truong quan, trong quan, truong quang
trung tuan » trung thanh, trung tam, tran tuan
nhung cong » dung cong, thong cong, hang cong
theo cau » theo chu, theo cap, theo dau
cau sach » cao sach, hau sach, rau 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

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo cau sach - thanh ((trung quan) or (trung tuan)) nhung cong dan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo cau sach - thanh ((trung quan) OR (trung tuan)) nhung cong dan chan cau.
• Adding a wildcard symbol may retrieve word variants: theo cau sach - thanh ((trung quan) or (trung tuan)) nhung cong dan chan cau*.