Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lap van duc slippers" » "lap va duc slippers", "tap van duc slippers", "lap ban duc slippers", "lap van duy slippers", "lap van du slippers", "lap tran duc slippers", "lap van duc slippery", "lap van duc 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: (((("lap van duc slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
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