Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"dun dung luan snippets" » "dung dung luan snippets", "dan dung luan snippets", "duc dung luan snippets", "dun dung quan snippets", "dun dung lan 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 ("dun dung luan snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( dun dung luan snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("dun dung luan snippets"))) or ("locating bug core snippets"))*.