Some more examples to help you further grasp the meaning and usage of (ni tsuite) ;
nippon no keizai ni tsuite kenkyuu shiteimasu.
(I'm researching about Japanese economy.) 
(I'm doing research on Japan's economy.)
[keizai=economy]  [kenkyuu suru = to research ] 
konpyuutaa no tsukai kata ni tsuite no hon ga hoshii.
(I want a book about how to use computers.)
(I want a book on how to use computers.) 
[tsukai kata = way of using something] 
