Hello ZHENYUZENGGTV,
in the Find and replace function, optimization is more on the find parameters to Find by Formulas, values and Comments. because you are looking for a particular item in the cells. Sometimes you may see those parameters in the Replace tab, and its hard to reproduce. I usually take it as a glitch in excel when that happens.
if you are looking for something in particular, use the FIND tab and once found you can initiate the replacement where you have the specifics.
Kind regards.