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 thi snippets" » "van chuong thi snippets", "van duong thi snippets", "van cong thi snippets", "van luong thi snippets", "van vuong thi 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 thi snippets") OR ("using java java snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( van cuong thi snippets ) or ( using java java snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("van cuong thi snippets") or ("using java java snippets"))) or ("locating bug core snippets"))*.