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