Perhaps you should try some spelling variations:
"ca doi code snippets" » "ca doi cong snippets", "ca doi co snippets", "ca doi de snippets", "cau doi code snippets", "cac doi code snippets", "va doi code snippets", "ca 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: (((("ca 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: (((("ca doi code snippets") OR ("python using a snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ca doi code snippets ) or ( python using a snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ca doi code snippets") or ("python using a snippets"))) or ("locating bug code snippets"))*.