Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhu phuong » thu phuong, nhung phuong, thi phuong
phuong dan » phuong danh, phuong doan, huong dan
doi chieu » doc hieu, doi chi, ho chieu
trinh va » trinh van, trinh vat, trinh vi
trinh ve » trinh he, trinh vi, trinh viet
toan ban » van ban
toan cao » toan tap

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 ((trinh va) or (trinh ve)) nhu phuong dan ((toan ban) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh ((trinh va) OR (trinh ve)) nhu phuong dan ((toan ban) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh ((trinh va) or (trinh ve)) nhu phuong dan ((toan ban) or (toan cao))*.