Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
cong ngang » cong nhan, cong lang, cong nong
cong quang » luong quang, thong quang, duong quang
doi chieu » doc hieu, doi chi, ho chieu
van manh » van minh, van anh, van hanh
phan dau » phan tu, hang dau
lan anh » van anh, tuan anh

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 - ((van manh) or (lan anh)) va nhung ((cong ngang) or (cong quang)) phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - ((van manh) OR (lan anh)) va nhung ((cong ngang) OR (cong quang)) phan dau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - ((van manh) or (lan anh)) va nhung ((cong ngang) or (cong quang)) phan dau*.