Search supports filtering by tags union e.g., [datetime] or [timezone]. It find posts that have either of the tags. See Advanced Search Options Syntax: Multiple Tags, And Vs. Or.
It is possible to do both. For example, to find posts that have
[python] tag and have either
[timezone] tags: [python] [datetime] [or] [timezone] [python]. Note: It is necessary to repeat
[python] and it is necessary to use brackets around
OR. See Search for questions tagged [A] and also (tagged [B] or [C]).
Could we write it as
[python] ([datetime] or [timezone]) instead?
searching using both “and” and “or” (sum-of-products or product-of-sums) demonstrates that
[python] ([datetime] or [timezone]) is:question already works: it shows relevant question despite incorrect "tagged with" on the right.
Query on data stackexchange: Find [A] ([B] or [C]).