laser 4500 

if this brings up 100's of matches, then try 

laser 4500 hp

and if you get lots of products listed try 

laser 4500 hp colour

if this does not produce any results then maybe try  

laser 4500 hp color  (American)

or

4500 laser col (this would bring up both UK and American color or colours)

to source even fewer products you could always type

col 4500 laser hp printer (order is irrelevant)

and do not use 'AND'  'OR'  '('  ')'  '#' '$' '£'  '<'  '>'
..........................................................................................................

Summay

 do not use +/-/or/and/(/)

space out words i.e. laser jet would find laserjet, laser jet and jet laser

feel free to use manufacturers like hp or sony or ibm etc

feel free to use manufacturer part numbers and remember to use spaces instead of - or #

our search engine would find the same products if you typed in
laser jet 4500 or jet 4500 laser, order does not matter, as long as you use spaces

finally Remember to use spaces i.e. 4500laserjet would not match anything

More Examples

42   "   monitor      would match and list a monitor or monitors 42"

HP1233   3432    would match part number HP1233-3432

IBM  P  4  20  gb  128  dvd  would match an IBM PC or Desktop with a dvd drive and a 20gb harddisk space and 128mb ram

IBM P  4  Server  raid  would match an ibm P4 server with a raid5 array scsi hard disk

Sony clie case acc leather would match a leather case accessories for a sony clie pda

Information provided by Risk Free (UK) LTD