Compounds of しかし

• もしかし
  (exp,adv) (abbr) perhaps
  maybe
  by some chance
• 若しかして
  (exp,adv) (uk) perhaps
  possibly
• 若しかしたら
  (exp,adv) (uk) perhaps
  maybe
  perchance
  by some chance
  by any chance
  (P)
• もしかしなくても
  (exp,adv) (col) no need to guess
  certainly