I would love your feedback on my site. I want to rank well on Toyota Hilux Vigo Thailand keyword but have not been able to.

This site was ranking very well on some of the keywords as "toyota hilux vigo" toyota vigo double cab" "toyota vigo extra cab" "vigo thailand" "hilux thailand" "toyota hilux extra cab" and with all Toyota Dealer related searches as Toyota dealer Thailand, Toyota dealer Trinidad etc. but then there was a minor Google update on March 6 and site is now on page 2 on most of these searches which means that the site is recoverable. Any tips on what steps can be taken.

Also please give perspective on site design.