Large sites, such as Trip, are complex and when you create a new design things can be missed and the following is a case in point.
At the top of the image (above) is the advanced search from the old site and below that is the new site. Apart from the design there is a bit of functionality missing – the ability to combine search (called ‘recent searches’ at the top). This allowed users to build up fairly complex searches.
We’re now aware of this and hope to get a fix out early next week!