Tal vez debería intentar con algunas variantes ortográficas:
"children's first and children's playhouses" » "children's first and children's playmate", "children's art and children's playhouses", "children's films and children's playhouses", "children's fears and children's playhouses"
"children's digest and children's plays" » "children's dignity and children's plays", "children's best and children's plays", "children's digital and children's plays", "children's digest and children's play"

Puede conseguir más resultados ajustando la consulta de búsqueda.

• Si está tratando de utilizar operadores booleanos, deberán estar TODOS EN MAYUSCULAS: (("children's digest and children's plays") OR ("children's first and children's playhouses"))~.
• Eliminando comillas puede permitir una búsqueda más amplia: (( children's digest and children's plays ) or ( children's first and children's playhouses ))~.
• Agregando un comodín puede recuperar variantes de palabras: (("children's digest and children's plays") or ("children's first and children's playhouses"))*.