Minapa,
Some death are expected, but your goal is to minimize the loss. I would personally be very sad if I lost even 1 chick.
Basics:
1. HEAT
New born chicks need heat. UV heat bulbs (250 Watts) will put out a lot more heat than a regular incandescent bulbs. IF you have access to it, use it. Consider having more than 1 heat lamp. Observe the chicks' behavior. Do they look cold? They need heat. Do be careful. Don't burn them or the chicken house or your house.
2. WATER
They need to drink water. IF possible, consider filling up water container with very warm water instead of cold water. Warm water will help to keep them warmer. IF some chicks are not drinking water, dip their beak in the water so that they know that is water. Never run out of water.
3. FOOD
They need to eat. IF possible, feed them Starter food. They are designed for new born chicks. Never run out of food. They need to eat for survival and growth.
4. BEDDING
IF the chicks are eating sawdust, that is not good. It will swell inside their body and that can't be good. They will eat less food if they are eating significant amount of sawdust. IF possible, consider changing to other better bedding material such as wood shaving.
There is a very good guide for chicks. I have attached a pdf file. I hope this upload works. Check it out. It has excellent info that we can't cover fully in a single reply.
Danny Kim