The website [url removed, login to view] ranked on google search results first page for its main keywords "online tutoring", and "online math tutor" till october 2012, but since then the search engine ranking for these keywords has come down significantly, and hence website traffic has also reduced a lot. The white hat link building methods used earlier are no longer working. Can someone help to recover this website's organic search ranking and traffic, using white hat methods only?
In your response, please specify clearly what "tangible results" will be achieved with your quoted cost, in terms of search engine ranking and traffic improvement. If good results can be shown with this initial budget, there will be further ongoing work.