Perhaps you should try some spelling variations:
"dung thuc van slippers" » "dung thuoc van slippers", "duong thuc van slippers", "dung thu van slippers", "dung thuc vat slippers", "dung thuc dan slippers", "dung thuc va slippers", "dung thuc van slippery", "dung thuc van grippers"
"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: (((("dung thuc van slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung thuc van slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung thuc van slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung thuc van slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.