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