Your search for "Professor's Research - 021/SV-P" revealed the following:
Professor's Research - 023/025 - Holo Rare from Sword & Shield: Celebrations, available at 401 Games Canada. Rarity: Holo Rare Finish: Holofoil Card Text:Discard your hand and draw 7 cards.
Professor's Research (Japanese) - 021/SV-P - Promo from SV-P: Scarlet & Violet Promos, available at 401 Games Canada. Rarity: Promo Finish: Normal Artist: Yusuke Ohmura Card Text:Discard your hand and draw 7 cards.
Professor's Research (Japanese) - 022/SV-P - Promo from SV-P: Scarlet & Violet Promos, available at 401 Games Canada. Rarity: Promo Finish: Normal Artist: Yusuke Ohmura Card Text:Discard your hand and draw 7 cards.
Professor's Research (Japanese) - 168/SV-P - Promo from SV-P: Scarlet & Violet Promos, available at 401 Games Canada. Rarity: Promo Finish: Normal Artist: Yusuke Ohmura Card Text:Discard your hand and draw 7 cards.
Professor's Research (Japanese) - 169/SV-P - Promo from SV-P: Scarlet & Violet Promos, available at 401 Games Canada. Rarity: Promo Finish: Normal Artist: Yusuke Ohmura Card Text:Discard your hand and draw 7 cards.
Prof. Oak's Research - 98/112 - Promo (Professor Program 2004-05) from Pokemon Professor Program Promos, available at 401 Games Canada. Rarity: Promo Finish: Normal Card Text:Shuffle your hand into your deck, then draw 5 cards.