Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"duc tao khoi snippets" » "duc tao hoi snippets", "duc thao khoa snippets", "duc lao khoa snippets", "duc tan khoi snippets", "duc tho khoi snippets", "duc dao khoi 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 tao khoi snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( duc tao khoi snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("duc tao khoi snippets"))) or ("locating bug core snippets"))*.