Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
trinh nha » trinh phan, trinh chat, trinh chao
manh toan » thanh toan, anh tuan, tinh toan
tranh ha » thanh ha, trang ha, trinh ha
dan toan » van toan, dan than, xuan 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 - canh ((tranh ha) or (trinh nha)) thong thong ((dan toan) OR (manh toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - canh ((tranh ha) OR (trinh nha)) thong thong ((dan toan) OR (manh toan)) ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - canh ((tranh ha) or (trinh nha)) thong thong ((dan toan) OR (manh toan)) ban*".