Perhaps you should try some spelling variations:
"cong toan gian snippets" » "cong tan gian snippets", "cong hoan gian snippets", "cong tuan gian snippets", "cong toan giao snippets", "cong toan giai snippets", "cong tran gian snippets", "cong toan gian slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "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 toan gian 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 toan gian snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong toan gian snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong toan gian snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.