Perhaps you should try some spelling variations:
upon conversations » union conversations, open conversations, spoken conversations
christians upon » christians among, christians from, christians being
reef fishery » reef fishes, reef fish
8th century » 18th century, 5th century, 6th century
2 german » 3 german, 5 german
2023 8th » 2023 5th, 2023 7th