To search for an expression, just type that between quotation
marks. In example: "online manuals"
To get pages with one or another expression, search for:
expression1 or expression2. like in: "PerfMon tools" or
"snmp tools"
A search for a page with two specified expressions can be made
with: expression1 expression2. You, don't need to put the "and"
word, like in: support faq