Usually, flavours are combined because the person eating them likes the way they taste.
If you want to get familiar with usual flavour combinations, just start reading cookbooks. I mean really reading them, complete recipes, methods, side notes, etc. Avoid tv celebrity cookbooks as teaching/learning tools. Find books that center on one topic, like meat, or soups, or fish. They will concentrate in specific areas instead of jumping all over the menu.
How can we sleep while our beds are burning???