Perhaps you should try some spelling variations:
"human bones periodicals." » "human bonds periodicals.", "human stones periodicals.", "human moines periodicals.", "human bone periodicals.", "human bodies periodicals.", "human genes periodicals."
"human gases periodicals." » "human games periodicals.", "human leases periodicals.", "human gas periodicals.", "human causes periodicals.", "human gamers periodicals.", "human based periodicals."
"human cases periodicals." » "human caves periodicals.", "human classes periodicals.", "human leases periodicals.", "human causes periodicals.", "human case periodicals.", "human caspases periodicals."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("human bones periodicals.") or ((("human gases periodicals.") or ("human cases periodicals."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("human bones periodicals.") OR ((("human gases periodicals.") OR ("human cases periodicals."))))*.
• Removing quotes may allow a broader search: (( human bones periodicals. ) or ((( human gases periodicals. ) or ( human cases periodicals. ))))*.