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