Perhaps you should try some spelling variations:
colombian » colombiano (Expand Search), colombia (Expand Search), colombianos (Expand Search)
colombianoso » colombianooso (Expand Search), colombiaoso (Expand Search), colombianososo (Expand Search), colombianos (Expand Search), colombiano (Expand Search), colombianas (Expand Search)
colombiana » colombianoa (Expand Search), colombiaa (Expand Search), colombianosa (Expand Search), colombia (Expand Search)
colombianasa » colombianoasa (Expand Search), colombiaasa (Expand Search), colombianosasa (Expand Search), colombiasa (Expand Search), colombianas (Expand Search), colombianos (Expand Search), colombiano (Expand Search)
colombiao » colombiano (Expand Search), colombia (Expand Search), colombianos (Expand Search)
constitucional » institucional (Expand Search), constitucion (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((colombian OR (colombianoso OR colombianoso)) OR ((colombiana OR colombianasa) OR colombiao)) constitucional of 1991~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((colombian OR (colombianoso OR colombianoso)) OR ((colombiana OR colombianasa) OR colombiao)) constitucional of 1991*".