Perhaps you should try some spelling variations:
"dung vainh code slippers" » "dung vinh code slippers", "dung van code slippers", "dung ninh code slippers"
"dong rate code snippets" » "dong vat code snippets", "dong dat code snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung vainh code slippers") or ("dong rate code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung vainh code slippers") OR ("dong rate code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung vainh code slippers ) or ( dong rate code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung vainh code slippers") or ("dong rate code snippets"))) or ("locating bug code snippets"))*.