Perhaps you should try some spelling variations:
jeong yeon » jeong hyeok, jeang yean, jeong dahyeon
seung yeon » seung joon, seung won, seung youn
jing yang » jing fang, ying yang, yang yang
wang yang » wang yan, wang liang, wang yanling
ai test » api 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 ((jing yang) OR (wang yang)) ai test ((a min) OR (a mine)) ((seung yeon) OR (jeong yeon)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((jing yang) OR (wang yang)) ai test ((a min) or (a mine)) ((seung yeon) or (jeong yeon)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((jing yang) OR (wang yang)) ai test ((a min) or (a mine)) ((seung yeon) or (jeong yeon)) ;*.