Perhaps you should try some spelling variations:
seung joon » kyung joon, seung won, seung yeon
wang ying » wang yang, wang yong, wang jing
ying yang » yang yang, yin yang, ying chang
yang api » yang dali, yang di, yang jui
api test » ai test, i test, ii test
a maine » a marine, _ maine, a marne
a main » 1 main, 2 main

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: wang ying yang api test ((a main) OR (a maine)) seung joon ;~.
• Adding a wildcard symbol may retrieve word variants: wang ying yang api test ((a main) or (a maine)) seung joon ;*.