Perhaps you should try some spelling variations:
"dung thuc dan slippers" » "dung thuoc dan slippers", "duong thuc dan slippers", "dung thu dan slippers", "dung thuc hanh slippers", "dung hoc dan slippers", "dung thuc vat slippers", "dung thuc dan slippery", "dung thuc dan 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 dan 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 dan slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung thuc dan slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung thuc dan slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.