Termbase Autosuggest using the source language word

Hello. I may be missing something. I am fairly new to Trados. 

I see that to get an autosuggest from a Termbase, I need the first letter(s) of the corresponding word in the Target language. For example, if I have house = casa, I need to type a "c" to get the suggestions, but with an "h" it will not come up. 

Now... what if I can not recall the first letter(s) in the target language? In this case, Autosuggest would be useless. I would need to do a termbase search. And... well, I do have the Source word right in front of me.

I am a former WordFast user, and one of the very few things that I like better in WF is that it does work as I described: I may type either Source or Target word first letter(s) and the suggestion from the Glossary will come up. 

Is there a way to make it work in Trados? Or, if not, here is a suggestions for new versions.

Thanks!