Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
tong thong » dong thong, cong thong, thong thuong
ho chieu » theo chieu, hoc thieu, doi chieu
tung cua » trung cua, tuong cua, dung cua
tai tap » bai tap, tai tao, hai tap
tap cac » tai cac, tap trac

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

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