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