Perhaps you should try some spelling variations:
"dung cac dan snippets" » "luong cac dan snippets", "dung cho dan snippets", "dung tai dan snippets", "dung cac dan slippers"
"cong trinh java snippets" » "cong trinh 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 cac dan snippets") or ("cong trinh java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung cac dan snippets") OR ("cong trinh java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung cac dan snippets ) or ( cong trinh java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung cac dan snippets") or ("cong trinh java snippets"))) or ("locating bug code snippets"))*.