Moved to bugs section. Try searching for a normal strange (non-australium) and see if it shows up in that list.

EDIT: I tried it and it seems like you can't directly search for australium weapons, but they do show up in normal strange results. Are you sure you changed the quality to strange when searching?

I searched for strange weapons and my trade showed up but still they go down in the results because I mostly find ususal strange weapons this way.

I don't think it's working like it's supposed to do.

I just serached for a SA tomi, SA rocket, and SA black box and found your trade all three times.

Yep worked for me now, strange.

How do I get it so that the item I want is an australium? Everytime I type australium or strange or the weapons name it it either says "We couldn't find any matches for your search, sorry. If you didn't enter any items on either side, you'll never get any matches. If you want to do a wildcard search for any item with a certain attribute, then select the "Wildcard Item" and give it filters." or the normal and or festive version. All I want to do is create a trade where I get an Australium black box in return.

That's because you didn't set their quality to Strange. Also please don't necrobump.