How to avoid load the all node in an exposed filtered view

Hi, i create an exposed filtered view 2 exposed filters, one a textbox to enter a word and the other exposed filter a combobox filled with a taxonomy list. When the user enter the data in the first field, it search a value match in a cck field, the second filter, search in a taxonomy term, every works ok, but if the user don´t write in the first exposed filter the view show all nodes, I need that the view show a text or at least nothing if you don´t write in the first exposed filter.

I have tries every single option, even tried to combine with arguments, but i can´t find a way.

Excuse my English please.