Perhaps you should try some spelling variations:
"python missing data snippets" » "python using data snippets"
"locating bug core snippets" » "locating bug code snippets"
"dan dat de snippets" » "dan dat code snippets", "dung dat de snippets", "dong dat de snippets", "dinh dat de snippets", "dan vat de snippets", "dan hat de snippets", "dan dat dien 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 ("dan dat de snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python missing data snippets") OR ("dan dat de snippets"))) OR ("locating bug core snippets")).
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