"focus further" is correct and usable in written English, as well as spoken English.
You can use it when you want to suggest that someone should direct their attention to something else, or to give more attention and effort to something. For example: "If you want to advance in your career, you should focus further on developing your project management skills."
Yet even as Mr. Geithner tries to focus further on the financial rescue plan, the A.I.G. controversy will dog him for a second week.
And professional analysis will wither, while online sites will either cater for increasingly niche fields or focus further on celebrity and trivia.
Many people worry that adding a country with such a vastly different cultural and economic heritage like Turkey's to the mix would only soften that focus further.
Most courses offer laboratory classes that focus further on the subject matter and introduce students to the latest techniques in genetics and plant biology.
The findings point to widespread money laundering and could focus further attention on Iraq's central bank, the heart of an inquiry into financial wrongdoing involving top officials.
But their decision to break their silence will focus further attention on Ryanair after its chief executive, Michael O'Leary, promised to reform its "abrupt culture" and rein in its "macho" image.
In particular, as inhibition of L-type calcium channels blocks cancer cell invasion in vitro, it will be important to focus further studies on the potential of these channels as cancer targets using pre-clinical cancer models.
Danone, a French rival that makes only water, dairy products and biscuits, is doing better than Nestlé in all three sectors, and might focus further by selling its biscuits business.
"We are very pleased to reach our strategic objective to own 100 percent of SFR, which will help Vivendi to focus further on profitable growth and innovation," Jean-Bernard Levy, Vivendi's chairman and chief executive, said in a statement.
We focus further on the coupling of plasmonic gold nanoparticles and polymeric photonic structures by optimizing theoretically the photonic structures and developing efficient way to realize desired hybrid structures.
These nine maps are designed to assist in global risk mitigation by providing a general seismic hazard framework and serving as a resource for any national or regional agency to help focus further detailed studies required for regional/local needs.
