Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
canh trinh » canh tranh, hanh trinh, canh tinh
thong cong » trong cong, tong cong, thong thong
doi chieu » doc hieu, doi chi, ho chieu
vang chat » van chat, va chat, ban chat
trinh va » trinh van, trinh vat, trinh ve
va thong » va thuong, va phuong, he thong
van phat » va phat, van chat, van phan

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 trinh va thong cong ((vang chat) or (van phat)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - canh trinh va thong cong ((vang chat) OR (van phat)) tu.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - canh trinh va thong cong ((vang chat) or (van phat)) tu*.