Perhaps you should try some spelling variations:
"multiculturalist" » "multiculturalisme", "multiculturalismo", "multikulturalitat"
"multiculturalism" » "multicultural"
"horticultural" » "horticulture", "agricultural", "multicultural"
"horticulturist" » "horticulturists", "horticulturalists", "horticulture"

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: ((("multiculturalist" OR "multiculturalism") OR "horticultural") OR "horticulturist").
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((\"multiculturalist\" OR \"multiculturalism\") or \"horticultural\") or \"horticulturist\")".
• Removing quotes may allow a broader search: ((( multiculturalist OR multiculturalism ) or horticultural ) or horticulturist ).
• Adding a wildcard symbol may retrieve word variants: ((("multiculturalist" OR "multiculturalism") or "horticultural") or "horticulturist")*.