Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dung he trac slippers" » "dung cho trac slippers", "dung hoi trac slippers", "dung thi trac slippers", "dung hai trac slippers", "dung he trac slippery", "dung he trac 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 he trac 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 he trac slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung he trac slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung he trac slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.