Instruct everyone that is helping you not to call or chase your dog. This will prolong your search. If your dog is seen, you may sit, or lay down (no eye contact) and gently toss out treats to lure your pet in. Soft talk to them using a cute nickname you have for them at home.
Lost dogs use their natural instincts in order to survive. They have only three things on their brains: food/water, shelter, and keeping themselves safe, even to the point of staying away from their owners. Every time people are out searching in the area where your dog was seen, they think of this as a threat, which then increases their fear towards people and causing them to move out of the area.
Dogs lost in stressful situations such as car accidents, changing fosters homes, veterinary clinic, groomers, and rescue transport: these dogs usually do not travel far unless they are pushed out of the area, chased, or when search groups go out searching. 75% of these dogs are eventually recovered on the property they bolted from.
Remember, if you spot your dog, do not whistle, chase, or call him. This could cause him to panic and run into traffic, causing great injury. If you live in the area of snowmobile trails, please do not go out on your snowmobile or on 4x4 vehicles as this will terrify him and push him out of the area.