Multiple Query Fields Of A Form

Hello everyone!

I am new to MS Access. I am creating a small database for motor vehicle clearance. I have a SEARCH form where i want to put the fields for searching query table:

VEHICLE MAKE:

REF No.:

BEGIN DATE:
END DATE:

I need it in such a way that even when only one of the above fields is supplied with data it should still return correct data from the query table.

For dates (BEGIN DATE, END DATE) i tried: Between [forms]![search]![begin date] and [forms]![search]![end date]

This worked well when placed alone of the SEARCH form. But when i added more fields (VEHICLE MAKE, REF No.) the query returned nothing but a blank query table.

How can i possibly resolve this.

I will appreciated.