Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"using java java snippets" » "using data java snippets"
"van luong dan snippets" » "van duong dan snippets", "van cuong dan snippets", "nang luong dan snippets", "van huong dan snippets", "van luong dao snippets", "van luong van 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: (((("van luong dan snippets") OR ("using java java snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( van luong dan snippets ) or ( using java java snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("van luong dan snippets") or ("using java java snippets"))) or ("locating bug core snippets"))*.