Cho has been recently hit by a spate of injuries to several key players, including Bolton's Lee Chung-young and Wolfsburg's Koo Ja-cheol, who will both definitely miss the crucial qualifiers against Lebanon and Kuwait in the first week of September.
And while the absence of Lee and Koo will mean the Koreans will be missing two experienced campaigners plying their trade in Europe, Cho reveals he has no other option but to turn to the domestic league for replacements.
"Those playing in the K-League might be better as a short-term resource as they have been playing matches every week," Cho said, according to The Chosun Ilbo.
Kim Shin-wook of Ulsan Hyundai and Gyeongyam's Yoon Bit-garam have both been touted as possible introductions to the international fold.
Meanwhile, South Korea team doctor Song Joon-sub has confirmed Koo will definitely miss the qualifiers, despite his injury being relatively less serious than Lee's broken leg.
"It takes two to three weeks [for Koo] to return to normal life, and four weeks to get back on the pitch," said Song.
Korea Republic play host to Lebanon on September 2, before travelling to Kuwait four days later.