Perhaps you should try some spelling variations:
"human sites periodicals." » "human states periodicals.", "human fishes periodicals.", "human wastes periodicals.", "human bites periodicals.", "human side periodicals.", "human stem periodicals."
"human games periodicals." » "human gases periodicals.", "human ages periodicals.", "human homes periodicals.", "human gamers periodicals.", "human gametes periodicals.", "shuman james periodicals.", "human gazes periodicals.", "human genes periodicals.", "human gaits periodicals."
"human game periodicals." » "human flame periodicals.", "human care periodicals.", "human age 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 sites periodicals.") or ((("human games periodicals.") or ("human game periodicals."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("human sites periodicals.") OR ((("human games periodicals.") OR ("human game periodicals."))))*.
• Removing quotes may allow a broader search: (( human sites periodicals. ) or ((( human games periodicals. ) or ( human game periodicals. ))))*.