Perhaps you should try some spelling variations:
"using java core snippets" » "using data core snippets"
"dong so than snippets" » "dong son than snippets", "dong co than snippets", "cong so than snippets", "dong so phan snippets", "dong so thao snippets", "dong so tan snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code 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 core snippets") OR ("dong so than snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( using java core snippets ) or ( dong so than snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java core snippets") or ("dong so than snippets"))) or ("locating bug code snippets"))*.