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