Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trong » hanh trang, anh trong, hinh trong
doi chieu » doc hieu, doi chi, mot chieu
trong van » trong cac
van quang » van quan, tran quang, van tuan
cong tap » cuong tap, cong tan, tong tap
cong tac » cong ty
toan tap » toan ban

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 trong van quang ((cong tap) or (cong tac)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh trong van quang ((cong tap) OR (cong tac)) toan tap.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh trong van quang ((cong tap) or (cong tac)) toan tap*.