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
iai test » ii test, api test, car test
ai test » api test, i test, ii test
a mini » _ mini, a mining
a min » a main, a mine, 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 ((ai test) OR (iai test)) ((a min) OR (a mini)) seung yeon ;~.
• Adding a wildcard symbol may retrieve word variants: wang ying chang ((ai test) or (iai test)) ((a min) or (a mini)) seung yeon ;*.