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