Perhaps you should try some spelling variations:
"python using java slippery" » "python using data slippery"
"ke ban zhang slippers" » "ke ban hang slippers", "ke yan zhang slippers", "ke bin zhang slippers", "ke dan zhang slippers", "te ban zhang slippers", "ve ban zhang slippers", "ke ban zhang 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: (((("ke ban zhang slippers") or ("python using java slippery"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ke ban zhang slippers") OR ("python using java slippery"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ke ban zhang slippers ) or ( python using java slippery ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ke ban zhang slippers") or ("python using java slippery"))) or ("locating bug code snippets"))*.