Perhaps you should try some spelling variations:
"trac trung bi slippers" » "tran trung bi slippers", "tai trung bi slippers", "tac trong bi slippers", "trac truong bi slippers", "trac trung bo slippers", "trac trang bi slippers", "trac trung bi slippery", "trac trung bi grippers"
"dung java java snippets" » "dung va java 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: (((("trac trung bi slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( trac trung bi slippers ) or ( dung java java snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("trac trung bi slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.