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