Perhaps you should try some spelling variations:
"human cases periodicals." » "human gases periodicals.", "human caves periodicals.", "human classes periodicals.", "human causes periodicals.", "human case periodicals.", "human caspases periodicals."
"human bonds periodicals." » "human foods periodicals.", "human goods periodicals.", "human birds periodicals.", "human bones periodicals.", "human brands periodicals.", "human body periodicals."
"human game periodicals." » "human games periodicals.", "human flame periodicals.", "human care periodicals.", "human gaze periodicals.", "human gene periodicals.", "human gait 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 bonds periodicals.") or ((("human game periodicals.") or ("human cases periodicals."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("human bonds periodicals.") OR ((("human game periodicals.") OR ("human cases periodicals.")))).
• Removing quotes may allow a broader search: (( human bonds periodicals. ) or ((( human game periodicals. ) or ( human cases periodicals. )))).
• Adding a wildcard symbol may retrieve word variants: (("human bonds periodicals.") or ((("human game periodicals.") or ("human cases periodicals."))))*.