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