Perhaps you should try some spelling variations:
"inverse discrete ideal" » "inverse distance ideal", "versus discrete ideal", "inverse discrete dead", "inverse discrete areas", "inverse discrete items"
"dense discrete lindley" » "dense discrete line", "dense discrete lines", "dense discrete cylinder"
"dense discrete index" » "dense discrete input", "dense discrete wind", "dense discrete ime"

Try widening your search to All Fields.

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: (("inverse discrete ideal") OR ((("dense discrete index") OR ("dense discrete lindley")))).
• Removing quotes may allow a broader search: (( inverse discrete ideal ) or ((( dense discrete index ) or ( dense discrete lindley )))).
• Adding a wildcard symbol may retrieve word variants: (("inverse discrete ideal") or ((("dense discrete index") or ("dense discrete lindley"))))*.