Mix flour, coconut, and rolled oats.
Cream butter; gradually add brown sugar.
Dissolve soda in water. Gradually stir into creamed mixture.
Add vanilla to wet ingredients. Add flour mixture to wet ingredients, a part at a time.
Stir in chocolate chips.
Drop by spoonful on greased baking sheet. Press with fork. Bake at 375°F for 8-10 minutes.