If you are a vegetarian, or even more selective vegan, your choices for dining in Davao are slim. IMO Vegan Hygenic Foodhaus is far and away the best choice. If you want true vegan and any kind of selection, it's the only choice. They do have two locations though.
The menu itself is somewhat limited but they serve much more than what is listed on the menu. You need to look around the walls as they list a number of items there, too. If you don't see something - ask.
The other review mentioned a lack of raw, and while that isn't my main interest I will say they have an extensive raw salad menu and drinks. They are very good about making what you request.
Probably my favorite is the vegan burger. I'm not sure what grains it is made from but I do know it's not soy and therefor a refreshing change for me. It's a little small, so I need to supplement it with something, and their fresh fruit shake (smoothie) is perfect. No sugar or milk.
You need to take your time, talk with them, ask questions about what you don't know. The feeling is of down home, relaxing with friends. It is very laid back.
I highly recommend giving them a try if you are going to be in Davao.
Cons: Somewhat confusing menu, Service isn't about quickness