Perhaps you should try some spelling variations:
"python using java slippery" » "python using data slippery"
"dung ca lua slippers" » "dung cua lua slippers", "dung cac lua slippers", "dung cam lua slippers", "dung cay lua slippers", "dung ca cua slippers", "dung ca dua slippers", "dung ca lua grippers"
"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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"dung ca lua slippers\") OR (\"python using java slippery\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( dung ca lua slippers ) OR ( python using java slippery ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dung ca lua slippers") OR ("python using java slippery"))) OR ("locating bug code snippets"))*.