Translation: Making do with what you have.
Echar algo en falta.
Translation: Missing something.
Hacer falta.
Translation: To be needed.
Tener falta de algo.
Translation: To lack something.
A falta de algo, buenas son tortas.
Translation: Something is better than nothing.
No hay mal que por bien no venga.
Translation: Every cloud has a silver lining.
Falta hace que llueva.