Perhaps you should try some spelling variations:
seung yeon » jeong yeon, seung joon, seung won
ying chang » jin chang, yi chang, yin hang
wang ying » wang yang, wang yong, wang jing
chang api » chang ann, chang gui, chang jui
api test » ai test, i test, ii test
a mine » _ mine, a mini, a mile
a min » a main, a mini, a mind

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 chang api test ((a min) OR (a mine)) seung yeon ;~.
• Adding a wildcard symbol may retrieve word variants: wang ying chang api test ((a min) or (a mine)) seung yeon ;*.