Perhaps you should try some spelling variations:
seung yeon » jeong yeon, seung joon, seung won
min seung » min jeong
yi chang » ii chang, ying chang, jin chang
chang yi » chong yi, zhang yi, chang gui
test 4uf » test auf, test 4.2, test 4.3
wang yi » yang yi, tang yi, wang di
test 4 » test _

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yi chang yi ((test 4uf) OR (test 4)) min seung yeon ;~".
• Adding a wildcard symbol may retrieve word variants: wang yi chang yi ((test 4uf) OR (test 4)) min seung yeon ;*.