Perhaps you should try some spelling variations:
"23rd ifip study" » "23rd dip study", "23rd rflp study", "22nd ifip study"
"22nd ieee 3rd" » "2nd ieee 3rd", "22nd ieee 2nd"
"23rd itp study" » "23rd dipp study", "23rd up study", "23rd erp study", "23rd cirp study", "23rd i.e 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: (("22nd ieee 3rd") OR ((("23rd ifip study") OR ("23rd itp study")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"22nd ieee 3rd\") or (((\"23rd ifip study\") OR (\"23rd itp study\"))))".
• Removing quotes may allow a broader search: (( 22nd ieee 3rd ) or ((( 23rd ifip study ) OR ( 23rd itp study )))).
• Adding a wildcard symbol may retrieve word variants: (("22nd ieee 3rd") or ((("23rd ifip study") OR ("23rd itp study"))))*.