Perhaps you should try some spelling variations:
"python missing data snippets" » "python using data snippets"
"locating bug core snippets" » "locating bug code snippets"
"tri co cac snippets" » "tri co code snippets", "tai co cac snippets", "trinh co cac snippets", "tri cho cac snippets", "tri ca cac snippets", "tri co cau 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 ("tri co cac snippets"))) or ("locating bug core snippets"))~.
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