Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dan can chan snippets" » "dan dan chan snippets", "dan cam chan snippets", "dan ban chan snippets", "dan chan chan snippets", "dan canh chan snippets", "dan ca chan snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

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