Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"cong du chat snippets" » "cong dau chat snippets", "cong duc chat snippets", "cong duy chat snippets", "cong duoc chat snippets", "cong dung chat snippets", "cong doc chat 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 du chat 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 du chat snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong du chat snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong du chat snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.