Note: this search page is an excellent place to find surnames, townships, or most anything on the IAGenWeb Chickasaw County site, but it is only for this county.
If you are searching for a name, be creative. Try different spellings, like Schmidt, Schmitt, Schmitz, or Smith.
Even misspellings, like Boshop for Bishop, or Yanke for Yankee can be worth trying.
Less is more: for some items, try only part of what you're looking for, like Rourke instead of O'Rourke.