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