Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi cot tiep slippers" » "doi cot thep slippers", "doi hoa tiep slippers", "doi noi tiep slippers", "doi co tiep slippers", "doi cong tiep slippers", "doi cuoc tiep slippers", "doi cot tiep slippery", "doi cot tiep 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: (((("doi cot tiep slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doi cot tiep slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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