How to perform an Advanced Search
The "Advanced Search" option is the easiest way to search the database: you can enter any string in each field and thus make combinations: eg. any athlete called Menekrates, who hails from Sillyon who was active at Olympia etc. The result will be a list of the relevant Events, from where you can narrow down your search.
What is the general search
The "General Search" option allows you to search for a term in any of the fields in the "Advanced Search". It is meant to be a last resort measure.