Perhaps you should try some spelling variations:
coast frisian » east frisia
lang yanling » wang yanling, wang yangming, zhang yunling
west frisian » des frisian, west eurasian, west african
john wong » john song, john bonn
wong star » lone star, wong sam, wong sau
yang jin » yang jie, yang jun, ying jin

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: lang yanling ((yang jin) OR (yang di)) ((west frisian) OR (coast frisian)) john wong star ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "lang yanling ((yang jin) or (yang di)) ((west frisian) OR (coast frisian)) john wong star ;~".
• Adding a wildcard symbol may retrieve word variants: lang yanling ((yang jin) or (yang di)) ((west frisian) OR (coast frisian)) john wong star ;*.