WillC said:A photo would help, but I can offer some general advice.
Your White Bird is a slow grower and tends to grow in spurts. If it was recently moved into a larger pot, that will slow top growth as it puts its energy into filling the larger pot with roots. Otherwise, provide maximum indoor sunlight as close to a sunny window as possible. Sunlight is the key to its growth.
Keep it tightly potted and water it as soon as the surface of the soil feels dry. Use plain water, but distilled or filtered if your tap water is hard.
Do not put it outside. The outside sun is many times more intense than the indoor sun. Cooler temps would be beneficial. Also, patience.