Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
canh trinh » canh tranh, hanh trinh, canh tinh
thong tai » truong tai, thong tin, hang tai
trinh va » trinh van, trinh vat, trinh ve
va thong » va thuong, va phuong, he thong
tai pham » tac pham, toi pham, tai phan
pham tu » phan tu, pham thi, pham tai

You may be able to get more results by adjusting your search query.

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