Perhaps you should try some spelling variations:
"dun nang trong slippers" » "dun nang truong slippers", "dun lang trong slippers", "dun mang trong slippers", "dung nang trong slippers", "den nang trong slippers", "luan nang trong slippers", "dun nang trong slippery", "dun nang trong 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: (((("dun nang trong slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dun nang trong slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dun nang trong slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dun nang trong slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.