Perhaps you should try some spelling variations:
"using two case snippets" » "during two case snippets", "using uwb case snippets", "using two cases snippets"
"python using c snippets" » "python using lc snippets", "python using a snippets", "python using _ snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("using two case snippets") or ("python using c snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using two case snippets") OR ("python using c snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using two case snippets ) or ( python using c snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using two case snippets") or ("python using c snippets"))) or ("locating bug code snippets"))*.