Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dung luan 42 slippers" » "dung quan 42 slippers", "dung lan 42 slippers", "dung luan 42 slippery", "dung luan 42 grippers"
"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: (((("dung luan 42 slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung luan 42 slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung luan 42 slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung luan 42 slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.