Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
chinh cua » chinh ca, chinh sua, chinh luan
hinh cua » sinh cua, tinh cua, dinh cua
toan tap » toan ban
co dan » co ban, cao dang
ca dan » cac dan, ca dao

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 - hanh ((chinh cua) or (hinh cua)) thuong ((co dan) OR (ca dan)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh ((chinh cua) OR (hinh cua)) thuong ((co dan) OR (ca dan)) toan tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - hanh ((chinh cua) or (hinh cua)) thuong ((co dan) OR (ca dan)) toan tap*".