Perhaps you should try some spelling variations:
commercial crops » commercial code, commercial credit, commercial banks
based invective » based interactive, based incentives, based investing
gene studies » gender studies, genetic studies, general studies
game studies » scale studies, ripe studies
act based » fact based, ict based, aet based

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

• Performing a fuzzy search may retrieve terms with similar spellings: commercial crops act based invective ((gene studies) OR (((game studies) OR (case studies)))).~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "commercial crops act based invective ((gene studies) OR (((game studies) OR (case studies)))).".
• Adding a wildcard symbol may retrieve word variants: commercial crops act based invective ((gene studies) OR (((game studies) OR (case studies)))).*.