Perhaps you should try some spelling variations:
"using python a slippers" » "think python a slippers", "using python _ slippers", "using python 3 slippers", "using python a grippers"
"dung java java slippery" » "dung va java slippery"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

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

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