Custom search

Hi!

I'm using "core/search_items" (Wialon SDK - remote API) to get orders (from Logistics), with params {"spec":{"itemsType":"avl_resource","propName":"sys_name","propValueMask":"*","sortType":"sys_name"},"force":1,"flags":524288,"from":0,"to":0}

All orders are received from the server, is there a way to filter before querying the API?

I'm reading the documentation but is a bit confusing (Multicriteria search, Using comparison operators in search...).

Could someone guide me?

Thanks in advance,