Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"dan viet ngoc snippets" » "dan viet goc snippets", "dan viet ngu snippets", "dan diem ngoc snippets", "danh viet ngoc snippets", "san viet ngoc snippets", "dao viet ngoc 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 ("dan viet ngoc snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( dan viet ngoc snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("dan viet ngoc snippets"))) or ("locating bug core snippets"))*.