Nam Mun Peud น้ำมันพืช
Any cooking oil can be used with Thai cooking. I generally use canola oil or safflower oil or frying and olive oil stir fries. Even though olive oil is not part of the the Thai cuisine, I don't find that it change the taste in Thai food.
In the old days people used coconut oil and lard in cooking Thai food. Now, either one of them is more expensive than bottled cooking oil available at supermarkets.