Perhaps you should try some spelling variations:
"nature e society pmis." » "nature e society pt.", "nature e society part.", "nature free society pmis.", "nature et society pmis.", "nature de society pmis.", "nature en society pmis."
"nature _ opiate users." » "nature _ opiate use.", "nature _ site users."
"nature open society pre." » "capture open society pre.", "natural open society pre.", "nature en society pre.", "nature open society part.", "nature open society pt."

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nature e society pmis.") OR ("nature open society pre."))) OR ("nature _ opiate users."))~.
• Removing quotes may allow a broader search: (((( nature e society pmis. ) or ( nature open society pre. ))) or ( nature _ opiate users. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("nature e society pmis.") or ("nature open society pre."))) or ("nature _ opiate users."))*.