Perhaps you should try some spelling variations:
"using vat phan slippers" » "using sat phan slippers", "using data phan slippers", "sinh vat phan slippers", "using va phan slippers", "using van phan slippers", "using vat phan slippery", "using vat phan grippers"
"dung java java snippets" » "dung va java snippets"
"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: (((("using vat phan slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using vat phan slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using vat phan slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using vat phan slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.