Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"lua hoc dat slippers" » "luan hoc dat slippers", "luc hoc dat slippers", "cua hoc dat slippers", "lua hoc dan slippers", "lua hoc dai slippers", "lua hoc phat slippers", "lua hoc dat slippery", "lua hoc dat grippers"
"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: (((("lua hoc dat slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( lua hoc dat slippers ) or ( dung java java snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("lua hoc dat slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.