Perhaps you should try some spelling variations:
"python missing data snippets" » "python using data snippets"
"dat cao de snippets" » "dat cau de snippets", "dam cao de snippets", "dao cao de snippets", "dat nao de snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: (((("dat cao de snippets") or ("python missing data snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dat cao de snippets") OR ("python missing data snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dat cao de snippets ) or ( python missing data snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dat cao de snippets") or ("python missing data snippets"))) or ("locating bug code snippets"))*.