Perhaps you should try some spelling variations:
"children's identity and children's playmate" » "children's dignity and children's playmate", "children's creativity and children's playmate", "children's identity and children's plays", "children's identity and children's playhouses", "children's identity and children's poetrymate"
"children's best and children's play" » "children best and children's play", "children's digest and children's play", "children's first and children's play", "children's best and children's poetry"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("children's best and children's play") or ("children's identity and children's playmate"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("children's best and children's play") OR ("children's identity and children's playmate")).
• Removing quotes may allow a broader search: (( children's best and children's play ) or ( children's identity and children's playmate )).
• Adding a wildcard symbol may retrieve word variants: (("children's best and children's play") or ("children's identity and children's playmate"))*.