Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"don thuc dan slippers" » "doan thuc dan slippers", "don thuoc dan slippers", "dong thuc dan slippers", "don thuc hanh slippers", "don hoc dan slippers", "don thuc vat slippers", "don thuc dan slippery", "don thuc dan grippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("don thuc dan slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
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