$a = "1", "Computer Name", "2"
$b = "3", "4", "Full Computer Name Here"

foreach ($line in $a) {
    foreach ($line2 in $b) {
         where "*$line*" -like "*$line2*"
    }
}

$a = "1","Computer Name","2"
$b = "3","4","Full Computer Name Here"
foreach ($line in $a ) {
    $b -match $line
}

foreach ($line in $a) {
    $b | Where-Object { $_ -like "*${line}*" }
}

foreach ($line in $a) {
    foreach ($line2 in $b) {
        if ($line2 -like "*${line}*") { $line2 }
    }
}

foreach ($line in $a) {
    $b -like "*${line}*"
}