Question mark (?) - Example: 'gr?y' retrieves documents containing 'grey' or 'gray'.Asterisk ( * ) - Example: 'elect*' retrieves documents containing 'electron,' 'electronic,' and 'electricity'.
Improve efficiency in your search by using wildcards.Example: (photons AND downconversion) - pump.Example: (diode OR solid-state) AND laser.Note the Boolean sign must be in upper-case. Separate search groups with parentheses and Booleans.Keep it simple - don't use too many different parameters.
