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