Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"yan zheng liu snippets" » "yan zhang liu snippets", "yang zhang liu snippets", "xuan zheng liu snippets", "yan zhifeng liu snippets", "yan cheng lin snippets", "yan cheng lu snippets"
"locating bug core snippets" » "locating bug code snippets"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("yan zheng liu snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( yan zheng liu snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("yan zheng liu snippets"))) or ("locating bug core snippets"))*.