Perhaps you should try some spelling variations:
trinh thuong » trinh phuong, trinh huong, trinh truong
minh thong » minh thuong, minh tuong, minh thang
thong dung » thong cong, thong thuong
hieu soat » hieu suat, hieu hoat, hieu luat
kiem soat » kiem toan
dung van » duong van, dung va, dang van
van hieu » cao hieu
luan va » luan van
luat va » xuat va, luat ve, suat va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( minh thong dung van hieu soat ) OR ( trinh thuong ((luan va) OR (luat va)) kiem soat ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( minh thong dung van hieu soat ) or ( trinh thuong ((luan va) OR (luat va)) kiem soat ))~".
• Adding a wildcard symbol may retrieve word variants: (( minh thong dung van hieu soat ) or ( trinh thuong ((luan va) OR (luat va)) kiem soat ))*.