Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
dong thanh » truong thanh
doi chieu » doc hieu, doi chi, mot chieu
toan tuan » tran tuan, toan quan, toan luan
doan tuan » doan quan, doanh luan, doan quang
dung dong » dung cong, vung dong, dung trong
tuan tai » toan tai, quan tai, tuan tuoi
tan tai » toan tai, tang tai, van tai

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 ((toan tuan) or (doan tuan)) dung dong thanh ((tuan tai) OR (tan tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - thanh ((toan tuan) OR (doan tuan)) dung dong thanh ((tuan tai) OR (tan tai)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - thanh ((toan tuan) or (doan tuan)) dung dong thanh ((tuan tai) OR (tan tai))".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh ((toan tuan) or (doan tuan)) dung dong thanh ((tuan tai) OR (tan tai))*.