Perhaps you should try some spelling variations:
"python using java slippery" » "python using data slippery", "python using java slippers"
"le van zhang grippers" » "le van khang grippers", "le van hang grippers", "le van thang grippers", "le van zhang slippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets", "locating bug code slippers"

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: (((("le van zhang grippers") or ("python using java slippery"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("le van zhang grippers") OR ("python using java slippery"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( le van zhang grippers ) or ( python using java slippery ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("le van zhang grippers") or ("python using java slippery"))) or ("locating bug code snippets"))*.