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