Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"tang dan su slippers" » "tang van su slippers", "tung dan su slippers", "tang luan su slippers", "tang dang su slippers", "tang dan su slippery", "tang dan su 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: (((("tang dan su slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tang dan su slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tang dan su slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tang dan su slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.