Perhaps you should try some spelling variations:
wang handling » wang yanling, cargo handling, waste handling
jeong hyeok » jeong dahyeon
chen chang » chin chang, shen chang, when change
chen chung » chen chuling, chen shuang, chen chuan
yang yang » wang yang, wang yan
mae jeong » lee jeong, min jeong
yi hua » li hua, ya hua, yi hui

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((yang yang) or (wang handling)) yi hua ((chen chang) OR (chen chung)) mae jeong hyeok ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((yang yang) OR (wang handling)) yi hua ((chen chang) OR (chen chung)) mae jeong hyeok ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yang yang) or (wang handling)) yi hua ((chen chang) OR (chen chung)) mae jeong hyeok ;*".