Perhaps you should try some spelling variations:
"using vat duong snippets" » "using sat duong snippets", "using data duong snippets", "sinh vat duong snippets", "using van duong snippets", "using mat duong snippets", "using va duong snippets", "using vat duong slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "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 duong snippets") 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 duong snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using vat duong snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using vat duong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.