Perhaps you should try some spelling variations:
"pseudo- invariant features OR invariant measure " » "pseudo- invariant feature OR invariant measure ", "pseudo- invariant measures OR invariant measure ", "pseudo- important features OR invariant measure ", "pseudo- invariant features OR invariant measures ", "pseudo- incovariant features OR invariant measure ", "pseudo- invariance features OR invariant measure "
"pseudo-variant features" » "pseudo-variant feature", "pseudo-covariant features", "pseudo-variance features"

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: "((\"pseudo-((invariant features) OR (invariant measure))\") OR (\"pseudo-variant features\"))".
• Removing quotes may allow a broader search: (( pseudo-((invariant features) OR (invariant measure)) ) OR ( pseudo-variant features )).
• Adding a wildcard symbol may retrieve word variants: (("pseudo-((invariant features) OR (invariant measure))") OR ("pseudo-variant features"))*.