We use free text searching. Use one or more keywords.
If you type good installation the results will be pages and documents including these keywords like:
Simple words – Either installation or good
Combinations – Both installation and good at the same page
Phraces - good installation, exatcly as you wrote in the box
If you want both the keywords to appear at the same page write installation & good.
Please write the keywords in primary form. The keyword price will be searching for pages including price, the price, prices and so on.