Perhaps you should try some spelling variations:
"dung lang tren slippers" » "dung dang tren slippers", "dung nang tren slippers", "dung land tren slippers", "dung hang tren slippers", "dung lanh tren slippers", "dung tang tren slippers", "dung lang tren slippery", "dung lang tren 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 lang tren 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 lang tren slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung lang tren slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung lang tren slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.