Can Apricorn Maker be used to search for "Maxie's Hidden Ball Trick" since it has the word "Ball" in its name?
Nope, Maxie's Hidden Ball Trick is a Supporter, not an Item card.
Source: Celestial Storm FAQ (2018-07-20), TPCi Rules Team (2018-08-02)

Relevant cards

Note: All applicable cards may not be listed below.
SM7_124
SM7_161
XY5_133
XY5_158