best buko pie melt in your mouth

for dough sugar 4 tblspn salt 1tblspn butter 200 grms water 2 cup's Oil 2 tblspn all purpose flour 1 kilo for fillings buko 1kilo white sugar 250 grms condensed milk 1can water 4 cups cornstarch 200 grms butter 150 grms egg yolk only 5 pcs coconut milk 1cups