Perhaps you should try some spelling variations:
"free software license" » "free software libre", "free software case", "free software life", "de software license", "del software license", "en software license"
"el software license" » "el software libre", "el software case", "el software life", "del software license", "de software license"
"free software lcsh" » "de software lcsh", "del software lcsh", "en software lcsh", "free software con", "free software caso", "free software lynx"

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: (((("free software license") OR ("free software lcsh"))) OR ("el software license"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"free software license\") OR (\"free software lcsh\"))) or (\"el software license\"))~".
• Removing quotes may allow a broader search: (((( free software license ) OR ( free software lcsh ))) or ( el software license ))~.
• Adding a wildcard symbol may retrieve word variants: (((("free software license") OR ("free software lcsh"))) or ("el software license"))*.