Perhaps you should try some spelling variations:
dinh thuong » dinh huong, dinh duong, dinh cuong
thuong dung » thong dung, phuong dung, thuong dong
thieu suat » hieu suat, trieu suat, hieu luat
dung toc » dung hoc, dung coc, dung toi
van quan » van ban
quan bat » quan sat, quan ba, quang ban
bat bien » vat bien, bang bien, cam bien
bien so » bien doi

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( dinh thuong dung toc thieu suat ) or ( dinh van quan bat bien so ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( dinh thuong dung toc thieu suat ) OR ( dinh van quan bat bien so ))*.