Search items have to consist of 2 characters in minimum and must not  
exceed 200 characters (max).

Different search items need to be separated by space characters. To  
search for complete character strings, you can put several words in  
double quotation marks (e.g.: "chiller system").

Capital and small letters will not be differed in a search. To  
combine or exclude search items you can use search assistance AND, OR  
and NOT.