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