Copyright laws vary from country to country - and there is no single "world-wide" copyright system. Instead, most countries are members of the Berne Convention - which requires its member countries to recognize the copyright of works of authors from other signatory countries in the same way as it recognizes the copyright of its own nationals. Sri Lanka is a member country - and accordingly the laws of that country will apply for copying that you may do. Check with a local attorney to see if your plans qualify as "fair use" or if permission/compensation will be required for your intended use. GOOD LUCK!
Answered on Sep 09th, 2015 at 2:53 PM