Perhaps you should try some spelling variations:
tuong quan » truong quan, thong quan, luong quan
minh tuong » minh tuan, minh quang
hieu luat » hieu qua
minh ung » minh tung, minh cung, minh dung
dung van » duong van, dung va, dang van
van hieu » cao hieu
quan li » quan ly, quan tri
li bien » li dien, li hien, loai bien

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( minh ung dung van hieu luat ) or ( minh tuong quan li bien doi ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( minh ung dung van hieu luat ) OR ( minh tuong quan li bien doi )).
• Adding a wildcard symbol may retrieve word variants: (( minh ung dung van hieu luat ) or ( minh tuong quan li bien doi ))*.