Yes, you can!
The Hawaiʻi English Language program, part of the Department of Second Language Studies, offers short-term customized programs including Intensive Academic English, Hawaiian Culture and History, etc.
Also, UH Mānoa's Outreach College offers several excellent English courses throughout the year through the New Intensive Courses in English (NICE) program, University Preparation Program and more. Customized programs can also be arranged for groups.
Contact: (808) 956-6636 or email firstname.lastname@example.org (HELP)
(808) 956-3414 or email email@example.com (NICE)