Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets"
"using java core snippets" » "using data core snippets"
"dung cac tra snippets" » "luong cac tra snippets", "dung cho tra snippets", "dung tai tra snippets", "dung cac tro snippets", "dung ca tra snippets", "dung cac tru 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 ("dung cac tra snippets"))) OR ("locating bugs code snippets"))~.
• Removing quotes may allow a broader search: (((( using java core snippets ) or ( dung cac tra snippets ))) or ( locating bugs code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java core snippets") or ("dung cac tra snippets"))) or ("locating bugs code snippets"))*.