A recent announcement from Thomson Reuters points out a new enhancement to Westlaw searching called "Search Term Emphasis." You can see this when you are searching Westlaw Edge and click on the "Search Tips" button under the jurisdiction selector next to the search box:
Add emphasis to your most important search terms if your initial search did not return desired results. Search Term Emphasis can promote documents containing the emphasized terms. Apply Search Term Emphasis by adding a caret '^' after an important term. The caret symbol '^' is above the 6 on the keyboardNote that the "Search Tips" guide is also newly expanded and offers more help in conduction searches on Westlaw.
dog canine /p detect! /s drug /p trunk tire^ car automobile
qualified immunity excessive force taser^