you can use the options before you click search.

So you choose "item type"- "weapon" or "armour"
then choose the range ranking of the item you want, for a lvl 30 that would be rank 15
then you can choose what type of weapon or what type of armour: for a helmet, that is head
you can even make choose how the results wil be arranged in, like ones with the most ATK comes top and so on.

I think the current advance search options are good enough, I can find what I want...