Perhaps you should try some spelling variations:
waste handling » data handling
wang yong » wang hyoung, wang yan, yang yang
wang yang » wang yan, wang liang, wang yanling
yang hai » dang hai, yang di, yang jui
hai sin » hui sin, hei sing
sin yan » sun yan
yan jiu » yang jin

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((wang yong) OR (wang yang))) or (waste handling)) yang hai sin yan jiu (cong or kong) shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((wang yong) OR (wang yang))) OR (waste handling)) yang hai sin yan jiu (cong OR kong) shu ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((wang yong) OR (wang yang))) or (waste handling)) yang hai sin yan jiu (cong or kong) shu ;".
• Adding a wildcard symbol may retrieve word variants: ((((wang yong) OR (wang yang))) or (waste handling)) yang hai sin yan jiu (cong or kong) shu ;*.