Help with constraining a parallel interface

one way is to constrain strobe and data relative to their same one clk.

if you set min delay for each to -9 and max to +9 then you are asking for transitions to occur from -9 to +9 from edges (a tight window of 2 ns).

With data and strobe constrained for 2 ns relative to their edges you have ample room of about 8 ns for both setup and hold between strobe transition and data transition.