"...on keil ... how to compile [sic], run and debug an 'assembly program' ...
"note: i already worked with C and it wasn't a problem."

If you've already done it in 'C', then the principle is exactly the same - only the language is different:

1. Create your assembler sources;

2. Add them to the uVision Project;

3. Set options as required (see Assembler/Linker manual);

4. Press the 'Build' button;

Once it all builds OK,

5. Press the 'Debug' button, and get debugging!

BTW: the term "Compile" relates specifically to the translation of a High-Level Language (HLL; eg, 'C') using a Compiler; for assembler, the process is called "Assembling"