Perhaps you should try some spelling variations:
presentacion roberto » presentacion libro, presentacion jose
computer programmers » computer programs, computer programming, computers programming
ortiz presentacion » porte presentacion, dorsal presentacion, breve presentacion
python computer » methods computer

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

• Performing a fuzzy search may retrieve terms with similar spellings: ortiz presentacion roberto python computer programmers~.
• Adding a wildcard symbol may retrieve word variants: ortiz presentacion roberto python computer programmers*.