Perhaps you should try some spelling variations:
valve studies » value studies, wave studies, native studies
algae studies » algal studies, aquae studies, algae strains
algae species » algal species, larvae species, novae species
ontology » cytology

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((valve studies) OR (((algae studies) OR (algae species)))) in relational ontology.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((valve studies) or (((algae studies) OR (algae species)))) in relational ontology".
• Adding a wildcard symbol may retrieve word variants: ((valve studies) or (((algae studies) OR (algae species)))) in relational ontology*.