Give us, O Lord, a steadfast heart, which no unworthy affection may drag downwards; give us an unconquered heart, which no tribulation can wear out; give us an upright heart, which no unworthy purpose may tempt aside. Bestow upon us also, O Lord our God, understanding to know thee, diligence to seek thee, wisdom to find thee, and a faithfulness that may finally embrace thee; through Jesus Christ our Lord.
Between “wisdom to find thee” and “and a faithfulness that may finally embrace thee”, you need “conuersationem tibi placentem, perseuerantiam te fideliter expectantem” (something like “interaction[s] that please thee, perseverance to hope faithfully for thee”).
http://liberlocorumcommunium.blogspot.com/2014/08/concede-michi-concede-mihi.html
The two phrases you’re missing were also missing from Corpus Thomisticum when I went looking for this, but were quickly inserted after I pointed out their absence by comparison with the 1996 critical edition of Tocco’s [i]Ystoria[/i] ed. Le Brun-Gouanvic. It appears that Tocco added the whole of the “Concede mihi” to the fourth “edition” of the [i]Ystoria[/i] in the months leading up to the canonization of Aquinas on 18 July 1323, and Le Brun-Gouanvic considers it likely genuine.