Hello!!
Courses related to diploma in hotel managmanagement are mentioned :
1.Diploma in human resource management
2.Diploma in Business administration
3.Diploma in front office
4.Advanced diploma inTourism and Hotel management
5.Advanced diploma in construction management
6.Adavanced diploma in brand management
7.Advanced diploma in food and nutrition management
8.diploma in house keeping
9.Advanced diploma in Tourism and Hotel management these are some of the diploma courses ,I can provide you the link just go through it for more information about hotel management :
https://hospitality.careers360.com/articles/4476-Job-oriented-diploma-courses-in-Hotel-Management
Hope it would helps you..Thank you!!