Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"danh ngu java slippers" » "anh ngu java slippers", "thanh ngu java slippers", "danh ngon java slippers", "danh ngu va slippers", "danh ngu java slippery", "danh ngu 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: (((("danh ngu 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: (((("danh ngu java slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( danh ngu java slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh ngu java slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.