Perhaps you should try some spelling variations:
"cong tuan khung snippets" » "cong toan khung snippets", "cong tuan hung snippets", "cong tran hung snippets", "cong tan khung snippets", "cong luan khung snippets", "cong thanh khung snippets", "cong tuan khung 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: (((("dung java java snippets") or ("cong tuan khung snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("cong tuan khung snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( cong tuan khung snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("cong tuan khung snippets"))) or ("locating bug code snippets"))*.