Facts are supposed to be the grounds for truths. However, consider a conjunctive statement like "Paris is in France and New York City is in the USA". What fact grounds that? Is there such a thing as a "conjunctive" fact? Also, a similar question can be asked for disjunctive statements. Anyway, I just want to know, have any philosophers talked about this, and if so, can I see some texts where this is discussed?
I don't see why it should be problematic to suppose that there are conjunctive and disjunctive facts. To some extent it will depend on exactly what you take a 'fact' to be. There are different theories of what constitutes a fact, but we may reasonably suppose that a fact is a true proposition or what grounds a true proposition.
Take the simple case of perception. If I see a red circle, I am perceiving the conjunction that the thing I see is red and it is circular. If I see a small furry animal bounding across a field, I may be unable to identify it exactly because of the distance or the short time that it remains visible, but I may be quite justified in believing disjunctively that it is either a rabbit or a hare. In both cases, a single observation grounds the conjunction or disjunction.
More generally, what counts as a conjunction or a disjunction depends on the resources of your language. Suppose Alice speaks a dialect that has words for 'brother' and 'sister' but no word for 'sibling'. For Alice, to say that someone has a brother is a simple proposition, but to say a person has a sibling can only be expressed disjunctively: they have a brother or a sister. Now suppose Bob speaks a dialect that has a word for 'sibling', but no words for 'brother' and 'sister'. For Bob, to say a person has a siblling is simple, but to say a person has a brother can only be expressed conjunctively as male sibling.
So, propositions are quite flexible as to their conjunctive and disjunctive structure. This suggests that it is a good idea to be flexible about what constitutes a fact and avoid extreme forms of logical atomism that suppose that there is some universe of completely independent facts.