Perhaps you should try some spelling variations:
"using java java snippets" » "using data java snippets"
"doi cong java slippers" » "doi cong va slippers", "doi song java slippers", "noi cong java slippers", "moi cong java slippers", "doi cong java slippery", "doi 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: (((("doi 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: (((("doi cong java slippers") OR ("using java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi cong java slippers ) or ( using java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi cong java slippers") or ("using java java snippets"))) or ("locating bug code snippets"))*.