For multiple keyword searches use Advanced/Combined Search

Simple search is a single keyword search. Search box cannot be empty.


For simple search choose a single, most suitable keyword and repeat the simple search.

An example: Instead of 'Boeing 747-400' just try '747-400'

I.e. searches like 'OK-JET', 'Concorde', 'Lufthansa', 'Copenhagen', 'Spain', 'Antonov', 'A330-300', 'Mriya', 'Dreamliner', 'LHR', 'LKPR', 'EDDM', 'Boeing' etc. will work reasonably well.
(Note: While being a single keyword search, it is executed across a wider spectrum of db fields looking for the same keyword, and also the search could take few seconds to display results).