Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pcna ly do snippets" » "pcna ly dao snippets", "pcna ly doi snippets", "pcna ly du snippets", "pca ly do snippets", "ccna ly do snippets", "pcda ly do 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: (((("pcna ly do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("pcna ly do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pcna ly do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pcna ly do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.