Perhaps you should try some spelling variations:
"23rd hci study" » "23rd ci study", "23rd hvi study", "23rd icmi study"
"23rd i.e study" » "23rd ieee study", "23rd int study"
"23rd ii study" » "23rd ifip study", "23rd icmi study", "23rd int study"

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: (((("23rd ii study") OR ("23rd i.e study"))) OR ("23rd hci study")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"23rd ii study\") OR (\"23rd i.e study\"))) or (\"23rd hci study\"))".
• Removing quotes may allow a broader search: (((( 23rd ii study ) OR ( 23rd i.e study ))) or ( 23rd hci study )).
• Adding a wildcard symbol may retrieve word variants: (((("23rd ii study") OR ("23rd i.e study"))) or ("23rd hci study"))*.