Perhaps you should try some spelling variations:
"python missing data snippets" » "python using data snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung cu do snippets" » "dung cu code snippets", "dung cua do snippets", "dung co do snippets", "dung cho do snippets", "dung cau do snippets", "dung cuc do snippets", "dung tu do 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 ("dung cu do snippets"))) or ("locating bug core snippets"))~.
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