how can i query product from multi category,example : category,color,size by kooboo API

I try but seem not right

var tours = tourQuery.WhereCategory(regionQuery).WhereCategory(styleQuery).WhereCategory(durationQuery).WhereContains("Name", (object)keyword);

i try but not right

var and = new AndAlsoExpression(new WhereEqualsExpression(null, "UUID", "uuid1"), new WhereEqualsExpression(null, "UUID", "uuid2"));

tours = tourQuery.WhereCategory(regionQuery.Where(and))
.WhereCategory(styleQuery.Where(and))
.WhereCategory(durationQuery.Where(and))
.WhereContains("Name", (object)keyword);

Or

var and = new AndAlsoExpression(new WhereEqualsExpression(null, "UUID", "uuid1"), new WhereEqualsExpression(null, "UUID", "uuid2"));

tours = tourQuery.WhereCategory(regionQuery.Where(or))
.WhereCategory(styleQuery.Where(or))
.WhereCategory(durationQuery.Where(or))
.WhereContains("Name", (object)keyword);

all result null :(