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