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