Perhaps you should try some spelling variations:
"luoc doi code snippets" » "cuoc doi code snippets", "luoc dai code snippets", "hoc doi code snippets", "luoc doi cong snippets", "luoc doi co snippets", "luoc doi de snippets", "luoc doi code slippers"
"python using a snippets" » "python using a slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

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