Formatting URL for REST API with two q= variable parameters...

I am looking for some guidance around URL parameter formatting....

I have an asprunner.net site which has REST API enabled, and in which there is a query and list form called handout.

using okhttp to encode the url, this get call works just fine:

url="http://xxx-001-site5.btempurl.com/api/v1?table=handout&action=list&q=(fullname~contains~Test )";

as does this

url="http://xxx911-001-site5.btempurl.com/api/v1?table=handout&action=list&q=(locid~equals~22 )";

But i need to do is combine both variable queries, so locid=22 AND fullname contains Test, and I cannot find any resources that guide as to the accepted format, and nothing I have tried works. You arent allowed to have more than one q= , and none of the following work for example:

url="http://xxx-001-site5.btempurl.com/api/v1?table=handout&action=list&locid=22&q=(fullname~contains~Test)";
url="http://xxx-001-site5.btempurl.com/api/v1?table=handoutt&q=(fullname~contains~Test~and~locid~equals~22 )";
url="http://xxx-001-site5.btempurl.com/api/v1?table=handoutt&q=(fullname~contains~Test)&(locid~equals~22 )";

(when I say dont work, the api completely ignores the q= section and returns the full dataset

In the absence of finding any documentation I have run out of permutations to try and guessing rarely works! Strangely I cant even find the documentation that included the use of ~contains~ and it doesnt seem to be anywhere on Mr Google but it does work!

I have looked at okhttps urlbuilder, but it doesnt seem to cater for q=

I hope it is possible to have more than one query variable parameter - can anyone guide me as to the correct syntax

Many thanks DAvid