Perhaps you should try some spelling variations:
language attrition » language cognition, language description, language instruction
language detection » language definition, language education, language description
language action » language education, language functions, language interaction

Try widening your search to All Fields.

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: %((language acquisition) OR (((((language attrition) OR (language detection))) OR (language action)))) AND development%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((language acquisition) or (((((language attrition) OR (language detection))) or (language action)))) and development%22".
• Adding a wildcard symbol may retrieve word variants: %((language acquisition) or (((((language attrition) OR (language detection))) or (language action)))) and development%22*.