Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"toan va chat snippets" » "doan va chat snippets", "tran van chat snippets", "toan ban chat snippets", "toan van chat snippets", "toan va phat snippets", "toan va cham 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: (((("toan va 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: (((("toan va chat snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( toan va chat snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toan va chat snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.