Perhaps you should try some spelling variations:
jeong yeon » jeong hyeok, jeang yean, jeong dahyeon
ying chang » jin chang, yi chang, yin hang
seung yeon » seung joon, seung won, seung youn
ying yang » yang yang, yin yang, wang yang
api test » ai test, i test, ii test
test kaw » test a, test kit, test awt
kaw min » kyaw min, kan min, law 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) OR (ying chang)) api test kaw min ((jeong yeon) OR (seung yeon)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((ying yang) OR (ying chang)) api test kaw min ((jeong yeon) or (seung yeon)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((ying yang) OR (ying chang)) api test kaw min ((jeong yeon) or (seung yeon)) ;*.