Perhaps you should try some spelling variations:
seung yeon » jeong yeon, seung joon, seung youn
jing fang » jia fang, jin kang, weng fang
seung won » seung joon, seung youn, myung won
wen wang » wei wang, chen wang, weng fang
ai test » api test, i test, ii test
test 5 » test _, test 4
5 min » 5 main, 15 min, _ min

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 fang) OR (wen wang)) ai test 5 min ((seung yeon) OR (seung won)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((jing fang) or (wen wang)) ai test 5 min ((seung yeon) OR (seung won)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((jing fang) or (wen wang)) ai test 5 min ((seung yeon) OR (seung won)) ;*.