A bear's sense of smell is extremely acute, and they are constantly foraging in the summer and fall months. A bear bag can help hide the scent of your food, keeping the bears at bay. A bear bag is made of very strong polyethylene. Place your food in a separate aluminum liner and then in the bag, which the bear can't rip into. Put the whole thing in a waterproof, airtight plastic bag to minimize scents. The most dangerous bear is one that doesn't realize you're coming. If you make noise to announce your presence, they're more likely to get out of the way and leave you alone. If you don’t want to talk, carry a satellite radio and set it to a talk show. A bear is more likely to approach an individual than a group. Groups tend to make more noise than individuals, so the bear has a chance to silently sneak away before you run into it. When you see a bear, back away slowly, keeping an eye on the bear as you do. Take another route, or simply hike back the way you came. If you leave it alone, it will likely leave you alone. However, it's never safe to enter an area where you see a bear. If you spot one, get out of that area.

TL;DR in Vietnamese:
Mua một chiếc túi xua đuổi gấu để lưu trữ đồ ăn nhẹ. Nói chuyện, hát và tạo tiếng ồn khi ra ngoài leo núi. Leo núi cùng nhiều người để ngăn chặn gấu. Quay về đường khác nếu bạn nhìn thấy một con gấu ở xa.