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