Perhaps you should try some spelling variations:
trinh nhiet » trinh thiet, trinh nghien, trinh viet
danh trinh » hanh trinh, anh trinh, dan trinh
trinh nghe » trinh nghien, trinh nha
nhiet cua » nghiep cua, nhat cua, hieu cua
trinh he » trinh han, trinh hoa, trinh thi
duoc hoc » quoc hoi
so danh » do danh, so sanh, so dan
cua hoc » cua hoi, cua thuoc, cua nuoc

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: (( so danh trinh nhiet cua hoc ) OR ( duy khanh ((trinh nghe) OR (trinh he)) duoc hoc ))~.
• Adding a wildcard symbol may retrieve word variants: (( so danh trinh nhiet cua hoc ) or ( duy khanh ((trinh nghe) or (trinh he)) duoc hoc ))*.