problem in filtering with multi search

Facts :

- i have this search section over here .

- it works just fine i can multi search with this section by name and dropdown and date .

- this button over her its job to to clear the inputs (input.value = undefined) .

problem :

i can not search with one input , i have to fill all inputs so that results appear

i want that the user can search by name only or dropdown only or date only

and if the user want to multi search he can do it also

this is my code :

$w('#dataset1').setFilter(wixData.filter().eq("_owner", ii))
    $w('#dataset2').setFilter(wixData.filter().eq("_owner", ii))

    $w('#button16').onClick(() => {

        $w('#image4').show()
        setTimeout(() => { $w('#image4').hide() }, 750)
        $w('#dataset1').setFilter(wixData.filter().eq("_owner", ii).eq("date", $w('#appdatePicker2').value).eq("doc", $w('#dropdown2').value).contains("patient", $w('#input2').value).or(wixData.filter().eq('phone', $w('#input2').value)))
        $w('#dataset2').setFilter(wixData.filter().eq("_owner", ii).eq("date", $w('#appdatePicker2').value).eq("doc", $w('#dropdown2').value).contains("patient", $w('#input2').value).or(wixData.filter().eq('phone', $w('#input2').value)))

    })
    

    $w('#button17').onClick(() => {
        $w('#image4').show()
        setTimeout(() => { $w('#image4').hide() }, 750)
        $w('#appdatePicker2').value = undefined
        $w('#input2').value = undefined
        $w('#dropdown2').value = undefined
        $w('#dataset1').setFilter(wixData.filter().eq("_owner", ii))
        $w('#dataset2').setFilter(wixData.filter().eq("_owner", ii))

    })

any help will be appreciated

thanks for reading...