Google-Homepages Only

Finds only website homepages
and deprecates many:
1. pesky directories
2. page pollution
3. junk sites

See how to job search examples below

To find engineering companies.
engineers OR engineer OR engineering
( OR is always capitalized! )
add +jobs to find engineer related job boards

To find legal companies.
lawyers OR lawyer OR "legal services" OR "law firm"

Search words that the type of company you want a job at would use to describe themselves.

For painting companies painter OR painters OR painting. For roofing, roofer OR roofing OR roofs OR "new shingles". Then search their home page for jobs and get an idea if that company is a good prospect for a job.

REFINING YOUR SEARCH
multiple city searches:
+Toronto OR mississauga OR Markham OR scarborough

Highlighting companies add
+ltd. OR limited OR inc. OR incorporated OR LLP OR company OR Corp. OR corporation
(this gets rid of many non-company websites)