"aim to focus" is correct usage and can be used in written English.
For example, "This course will aim to focus on developing communication skills."
Most of the pictures were shot in black and white, a decision that Dukovic made with the aim to "focus on composition and draw the viewer toward the physical shape of the chaos".
I aim to focus on the way to deliver the message, according to the music, as humbly as possible, though that's not the right word because a conductor can never be humble".
Yoga was originally practised by holy ascetics in India, its aim to focus the mind, connect with a higher consciousness and, through this newfound compassion, end suffering in the world.
They aim to focus not on procedures, such as loading a pipette, but on the process of experimental design: choosing an experimental approach, modifying a protocol, analysing the data, working out what went wrong, and doing it all again.
The measures announced on Wednesday aim to focus the bank on three core businesses: French retail banking, international retail banking and financial services and corporate and investment banking and private banking.
WALL STREET JOURNAL RIM's Plan May Mean More Shrinking | The new chief executive of Research in Motion said last week he would aim to focus more on the traditional base of business and government customers.
