Perhaps you should try some spelling variations:
"dang quang len slippers" » "dung quang len slippers", "nang quan len slippers", "dang hung len slippers", "dang quang lien slippers", "dang quang yen slippers", "dang quang le slippers", "dang quang len slippery", "dang quang len 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung java java snippets") or ("dang quang len slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("dang quang len slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( dang quang len slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dang quang len slippers"))) or ("locating bug code snippets"))*.