Perhaps you should try some spelling variations:
"dung khoc hat slippers" » "dung khoa hat slippers", "dung hoc hat slippers", "dung thuoc hat slippers", "dung khuc hat slippers", "dung khoc hay slippers", "dung khoc hat slippery", "dung khoc hat 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 khoc hat 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 khoc hat slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung khoc hat slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung khoc hat slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.