Perhaps you should try some spelling variations:
"cong thuc code slippers" » "cong tac code slippers", "cong thuc co slippers", "cong thuc con slippers"
"dung vbugs code snippets" » "dung vbungs code snippets", "dung vbugss code snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code 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 vbugs code snippets") or ("cong thuc code slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung vbugs code snippets") OR ("cong thuc code slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung vbugs code snippets ) or ( cong thuc code slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung vbugs code snippets") or ("cong thuc code slippers"))) or ("locating bug code snippets"))*.