DTS / ETF / BFR

Examples:

battery terminal

finds documents containing 'battery' or 'terminal'

battery or terminal

same as above

battery and terminal

finds documents containing both 'battery' and 'terminal'

battery not terminal

finds documents containing 'battery' but not 'terminal'

(battery not terminal)and BOLT

finds documents containing 'BOLT' and 'battery', but not 'terminal'

bat*

finds documents containing words starting with the letters: bat