Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dung van luan slippers" » "duong van luan slippers", "dung va luan slippers", "dang van luan slippers", "dung van quan slippers", "dung van tuan slippers", "dung von luan slippers", "dung van luan slippery", "dung van luan 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 van luan 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 van luan slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung van luan slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung van luan slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.