Perhaps you should try some spelling variations:
"dung tren nao slippers" » "dung trong nao slippers", "dung trung nao slippers", "dung tren co slippers", "dung tren dat slippers", "dung tren may slippers", "dung tren nao slippery", "dung tren nao 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 tren nao 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 tren nao slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung tren nao slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung tren nao slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.