'improve knowledge about' is correct and usable in written English.
You can use it when you are talking about increasing your understanding of something. For example, "I plan to improve my knowledge about sustainable farming techniques."
The results analysis considerably improve knowledge about the riveting process and behaviour of riveted links.
CAS in ACL surgery can improve results at time 0 and can improve knowledge about ACL anatomy and kinematics.
Ever since Adam Smith, economics has been pursued as a science, as a discipline that seeks to improve knowledge about economic phenomena.
But its outlines are clear: it seeks to improve knowledge about suicide, to determine the best ways to prevent it, and to put such measures into practice.
They also urged it to improve knowledge about sexual and reproductive health and rights, and urgently address the lack of safe, convenient and adequate transport.
But Murphy, who is aware of King's work, welcomes any research that could improve knowledge about concussions and their long-term effects.
PPPL researchers working on the Magnetic Reconnection Experiment (MRX) are aiming to improve knowledge about solar outbursts, the formation of the sun and stars, and nuclear fusion reactions.
This study may improve knowledge about estimating the lifetime of rolling components after onset of a spall using FEA and accounting for structural damage state.
The proposed automatic approach could improve knowledge about river systems with highly variable widths, and about systems in areas covered by vegetation or inaccessible to field surveys.
Funded by the United States Department of Agriculture USDAA), MHAI involved an educational intervention to improve knowledge about mental health and aging in rural Appalachian counties.
This study evaluated Keeping Baby Safe In and Around the Car, a multimedia DVD designed to improve knowledge about car seat installation among parents of infants and toddlers.
