Perhaps you should try some spelling variations:
"algorithm python function" » "algorithm within function" (Expand Search), "algorithms within function" (Expand Search), "algorithm both function" (Expand Search), "algorithm protein function" (Expand Search)
"algorithm cost function" » "algorithm co function" (Expand Search), "algorithm could function" (Expand Search), "algorithm both function" (Expand Search), "algorithm test functions" (Expand Search), "algorithm cell function" (Expand Search)
"algorithm cl function" » "algorithm _ function" (Expand Search), "algorithm b function" (Expand Search), "algorithm a function" (Expand Search), "algorithm l function" (Expand Search), "algorithm cell function" (Expand Search), "algorithm cep function" (Expand Search)

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("algorithm cost function") OR ("algorithm cl function"))) OR ("algorithm python function"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"algorithm cost function\") OR (\"algorithm cl function\"))) OR (\"algorithm python function\"))".
• Removing quotes may allow a broader search: (((( algorithm cost function ) OR ( algorithm cl function ))) OR ( algorithm python function )).
• Adding a wildcard symbol may retrieve word variants: (((("algorithm cost function") OR ("algorithm cl function"))) OR ("algorithm python function"))*.