Perhaps you should try some spelling variations:
"master github portfolio" » "master within portfolio", "mastering github portfolio", "master without portfolio", "maltego github portfolio"
"master matlab portfolio" » "master lab portfolio", "master matrix portfolio", "master labs portfolio", "unter matlab portfolio", "master mail portfolio", "master math portfolio"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"master github portfolio\") OR (\"master matlab portfolio\"))".
• Removing quotes may allow a broader search: (( master github portfolio ) OR ( master matlab portfolio )).
• Adding a wildcard symbol may retrieve word variants: (("master github portfolio") OR ("master matlab portfolio"))*.