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