“Fresh” Orange Juice: Meaning, the ‘orange juice’ is fresh. Doesn’t necessarily mean that the oranges were fresh, just means the oranges were freshly juiced.
“Fresh Orange” Juice: Meaning ‘fresh oranges’ were squeezed to give the juice. Still doesn’t mean the juice is fresh. The oranges could have been fresh last week and were juiced when fresh (last week).
“Fresh Orange Juice”: Meaning freshly squeezed juice from fresh oranges. Oranges are fresh, juice is fresh.