Perhaps you should try some spelling variations:
creating documentation » generating documentation, teaching documentation, processing documentation
documentation methods » segmentation methods
methods preparing » method preparing, methods comparing, methods clearing
curve clustering » secure clustering, source clustering, tree clustering
preparing curve » preparing course, preparing nurses, preparing active

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• Performing a fuzzy search may retrieve terms with similar spellings: creating documentation methods preparing curve clustering~.
• Adding a wildcard symbol may retrieve word variants: creating documentation methods preparing curve clustering*.