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