Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dua vi trac slippers" » "dua va trac slippers", "dua li trac slippers", "dua hoi trac slippers", "dua voi trac slippers", "cua vi trac slippers", "qua vi trac slippers", "dua vi trac slippery", "dua vi trac 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.

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