Perhaps you should try some spelling variations:
"using java java snippets" » "using data java snippets"
"dien van hoc snippets" » "dien va hoc snippets", "dien dan hoc snippets", "dien ban hoc snippets", "dien van hoa snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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 ("dien van hoc snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( using java java snippets ) or ( dien van hoc snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java java snippets") or ("dien van hoc snippets"))) or ("locating bug code snippets"))*.