Perhaps you should try some spelling variations:
"using java core snippets" » "using data core snippets"
"trinh b van snippets" » "trinh _ van snippets", "trinh c van snippets", "trinh o van snippets", "trinh j van snippets", "trinh m van 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 ("trinh b van snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( using java core snippets ) or ( trinh b van snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java core snippets") or ("trinh b van snippets"))) or ("locating bug code snippets"))*.