Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"cong dan toan snippets" » "cong san toan snippets", "cong tan toan snippets", "huong dan toan snippets", "cong van toan snippets", "cong dan than snippets", "cong manh toan 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 dan toan snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( cong dan toan snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("cong dan toan snippets"))) or ("locating bug core snippets"))*.