Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"cong co doc snippets" » "dong co doc snippets", "cong cu doc snippets", "cong so doc snippets", "cong co duoc snippets", "cong co hoc snippets", "cong co dot 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: (((("cong co doc snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong co doc snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong co doc snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong co doc snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.