Perhaps you should try some spelling variations:
jeong hyeok » jeong dahyeon
wang yang » wang yan, wang liang, wang yanling
yang yang » wang yan
law main » law making, new main, law made
law pain » law part, law past
di test » ai test, i test, disk test
ii test » ai test, i test, api test

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yang yang ((di test) OR (ii test)) ((law main) or (law pain)) jeong hyeok ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang yang ((di test) OR (ii test)) ((law main) OR (law pain)) jeong hyeok ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang yang ((di test) OR (ii test)) ((law main) or (law pain)) jeong hyeok ;*".