Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
chat thong » chat chong, chat phong, chat trong
thong dan » thong van, tuong dan, thong den
dan than » dan chan, ban than, van than
than tu » thanh tu, thang tu, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: cao ((chieu sach) or (chiet tach)) - nhanh tinh chat thong thong dan than tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cao ((chieu sach) OR (chiet tach)) - nhanh tinh chat thong thong dan than tu.
• Adding a wildcard symbol may retrieve word variants: cao ((chieu sach) or (chiet tach)) - nhanh tinh chat thong thong dan than tu*.