Perhaps you should try some spelling variations:
dinh quan » dinh quang, dinh xuan, dinh duan
sinh cong » minh cong, trinh cong, chinh cong
phan hieu » van hieu, phan kien, gian hieu
hieu soat » hieu suat, hieu hoat, hieu luat
cong tan » cong tac, cong san, cong thanh
dat bien » vat bien, bat bien, dat dien
quan qua » quan quan, quan cua, quan quang
qua phan » cua phan, qua than, quang phan
tan dat » dan dat, ban dat, tan dac
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: (( sinh cong tan dat bien so ) or ( dinh quan qua phan hieu soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( sinh cong tan dat bien so ) OR ( dinh quan qua phan hieu soat ))*.