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