I guess the current version of the dictionary search function is not designed to be used for Strong's numbers per say.
(it used great when i used a "normal" dictionary with continuous search as you type... i really like that function)
however.. before i tried that i had strong's selected and thought i would search what words there are for faith.
It got a bit confusing when it started to jump to a certain number (05617) with the first keystroke and staid there as i continued to type FAITH. (the word 05617 was Hosee (i.e. Hosea)
After i changed to a glossary kind of dictionary (Swe1917Of) it worked really good. (although the last 15 words in that dictinoary had empty explanations)