Perhaps you should try some spelling variations:
dung thuong » dung trong, hang thuong, cong thuong
thuong van » thong van, truong van, thuong va
hieu soat » hieu suat, hieu hoat, hieu luat
tien soat » trien hoat, thien hoat, kiem soat
van hieu » cao hieu
van tien » toan tien, van tuan
tin » tinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tin dung thuong van hieu soat ) or ( trinh dung (luan or lan) van tien soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin dung thuong van hieu soat ) OR ( trinh dung (luan OR lan) van tien soat )).
• Adding a wildcard symbol may retrieve word variants: (( tin dung thuong van hieu soat ) or ( trinh dung (luan or lan) van tien soat ))*.