Perhaps you should try some spelling variations:
"python using data slippery" » "python using java slippery", "python using sat slippery", "python missing data slippery", "python using data slippers"
"ke yan zhang grippers" » "ke yang zhang grippers", "ke ban hang grippers", "ke van khang grippers", "ke dan zhang grippers", "ke san zhang grippers", "ke ban zhang grippers", "ke yan zhang slippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets", "locating bug code slippers"

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

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