Hi Bimala,

A number of universities abroad offer short-term courses of various duration for specialized courses.

A few that I can list are:

Level 6 Diploma in Management (Finance) from London School of International business UK

International Business and Finance, Certificate from University of Warwick, UK

Corporate Finance - Financial Strategic Planning, from University of Sussex, UK

Macroeconomic Policy & Financial Markets, Certificate from SOAS University of London

Finance, Short Course from London School of Business and Finance

Financial Decision Making - A Simulation Approach, Short Course from Aarhus University, Denmark

A number of courses are also available on online courses sites like Coursera, Edx etc.

Hope you find the best one.