Custom search query for wordpress

I need some help implementing a search filter on a wordpress website. I want to have the same search filter implemented like here: [login to view URL] It needs to be implemented on this website: [login to view URL] I have a postmeta field which contains the following values: a:1:{i:0;a:7:{s:2:"id";s:3:"107";s:4:"name";s:10:"[login to view URL]";s:7:"logoUrl";s:10:"depricated";s:5:"price";s:5:"35.95";s:20:"product_shippingtime";s:9:"2-3 dagen";s:21:"product_shippingprice";s:1:"0";s:11:"purchaseURL";s:146:"[login to view URL][[http%3A%2F%[login to view URL]%[login to view URL]]]";}} The search filter should search into the postmeta field