Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"cong my chat snippets" » "chong my chat snippets", "cong may chat snippets", "cong ty chat snippets", "cong ly chat snippets", "cong my thuat snippets", "cong muc 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 my 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 my chat snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong my chat snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong my chat snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.