Perhaps you should try some spelling variations:
trinh hieu » trinh dieu, trinh thiet, trinh nhiet
nguoi kieu » nguoi tieu, nguoi dieu, nguoi thieu
hieu suat » hieu luat, hieu qua
hoc tieng » hoc hien
tieng han » tieng anh
kieu nha » lieu nha, kieu khac, hieu nhat
nha hoc » nha thuoc, khoa hoc, nha nuoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: giao trinh hieu suat ((chinh cho) or (danh cho)) nguoi kieu nha hoc tieng han~.
• If you are trying to use Boolean operators, they must be ALL CAPS: giao trinh hieu suat ((chinh cho) OR (danh cho)) nguoi kieu nha hoc tieng han*.