Perhaps you should try some spelling variations:
waste handling » data handling
chen yugang » chen huigang, chen yang, chen yulan
yugang jing » huang jing, yang jing
wang yang » wang yan, wang liang, wang yanling
jing hong » hong hong, tin hong, eng hong
hong yu » wong yue
kyi ta » kyi a

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) or (waste handling)) ((kyi ta) OR (yi ta)) chen yugang jing hong yu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang yang) OR (waste handling)) ((kyi ta) OR (yi ta)) chen yugang jing hong yu ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang yang) or (waste handling)) ((kyi ta) OR (yi ta)) chen yugang jing hong yu ;*".