Perhaps you should try some spelling variations:
waste handling » data handling
handling wang » handling await, handling large, handling data
sang minh » kang minah, anh minh, song min
tang min » chang min, yang mind, tang li
hong hai » shang hai, zhong tai, dang hai
hua ren » hua chen
tang » thang
tan » than

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

• Performing a fuzzy search may retrieve terms with similar spellings: waste handling wang hua ren ((sang minh) or (tang min)) ((hong hai) OR (hong tan)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: waste handling wang hua ren ((sang minh) OR (tang min)) ((hong hai) OR (hong tan)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "waste handling wang hua ren ((sang minh) or (tang min)) ((hong hai) OR (hong tan)) ;".
• Adding a wildcard symbol may retrieve word variants: waste handling wang hua ren ((sang minh) or (tang min)) ((hong hai) OR (hong tan)) ;*.