search bar not working on my site - < ?php echo $search; ?>

Hello: I'm not sure if this is the correct forum to post this problem - sorry if it's not. My search bar has this "< ?php echo $search; ?>" in it and when I search for stuff (the enter button doesn't work - only clicking on the magnify glass works) I get the following error message "Search Criteria
Search:
Notice
: Undefined variable: filter_name in
/home1/lilterra/public_html/catalog/view/theme/teez/template/product/search.tpl
on line
14

All Categories

Notice
: Undefined variable: filter_sub_category in
/home1/lilterra/public_html/catalog/view/theme/teez/template/product/search.tpl
on line
43
Search in subcategories
Notice
: Undefined variable: filter_description in
/home1/lilterra/public_html/catalog/view/theme/teez/template/product/search.tpl
on line
50"

Could anyone help me out?
Thanks,
Glenn
lilterra.com

Theme version not suitable for used version OpenCart.

Also take a look at header cart contents when items are in cart.

Ask theme developer.