First, you need to check both the export and import logs to see if there were any relevant failures or warnings that might explain why there are missing objects.
Next you need to compare the two schemas to identify what the missing objects are.
Finally, it is sometimes useful to generate an SQL file from the dump file to identify exactly what the dump file contains, so see what is actually missing compared to the source database.
Unfortunately, there is no simple trick to do this. It involves you investigating the difference.