Perhaps you should try some spelling variations:
"python missing data snippets" » "python using data snippets"
"locating bug core snippets" » "locating bug code snippets"
"doi va hat snippets" » "hoi va hat snippets", "noi va hat snippets", "dai va hat snippets", "doi va phat snippets", "doi va chat snippets", "doi va hoat snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("python missing data snippets") or ("doi va hat snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python missing data snippets") OR ("doi va hat snippets"))) OR ("locating bug core snippets")).
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