Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tao luan dan slippers" » "dao luan dan slippers", "tang luan dan slippers", "tao thuan dan slippers", "tao luan danh slippers", "tao luan van slippers", "tao luat dan slippers", "tao luan dan slippery", "tao luan 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: (((("tao luan dan slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
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