Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"cong tu zhang snippets" » "cong yu zhang snippets", "cong tao zhang snippets", "cong hui zhang snippets", "cong ty zhang snippets", "cong cu zhang snippets", "dong tu zhang 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 ("cong tu zhang snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( cong tu zhang snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("cong tu zhang snippets"))) or ("locating bug core snippets"))*.