Perhaps you should try some spelling variations:
"cong trong mot snippets" » "cong thuong mot snippets", "cong trinh mot snippets", "dung trong mot snippets", "cong trong moi snippets", "cong trong trot snippets", "cong trong hoat snippets"
"dung java java snippets" » "dung va java 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 trong mot 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 trong mot snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong trong mot snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong trong mot snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.