Try to use /search/issues. my query works good on guthub page. But I get problem in getitem

await gh.getitem(f"/search/issues?q=type:pr")
await gh.getitem(f"/search/issues?q=is::pr")

Get error - gidgethub.InvalidField: Validation Failed for 'q'
But
await gh.getitem(f"/search/issues?q=is:merged+type:pr") works
Also my repo contains dots. And
await gh.getitem(f"/search/issues?q=repo:{name_with_dots}") does not work.
My last params is date: merged:>YYYY-MM-DD - it does not work too in gh.getitem

It looks so strange. Could you please help me with this problem?