Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trung tuan » trung thanh, trung tam, tran tuan
thong dung » thong cong, thong thuong
doi chieu » doc hieu, doi chi, ho chieu
trung cua » truong cua, trung cap, dung cua
toan tap » toan ban
va toan » van toan, bai toan, tap toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - thanh ((trung cua) or (trung tuan)) thong dung va toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - thanh ((trung cua) OR (trung tuan)) thong dung va toan tap.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh ((trung cua) or (trung tuan)) thong dung va toan tap*.