Perhaps you should try some spelling variations:
trinh hieu » trinh dieu, trinh thiet, trinh nhiet
ninh viet » sinh vien, anh viet
hoc tieng » hoc hien
tieng han » tieng anh
qua danh » luan danh, luat danh, quoc danh
viet nma » viet nm, viet nami, viet nhat
qua dan » qua ban, cua dan, mua dan
nma hoc » nha hoc, nhan hoc

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) or (ninh viet)) ((qua danh) OR (qua dan)) cua nguoi viet nma hoc tieng han~.
• If you are trying to use Boolean operators, they must be ALL CAPS: giao ((trinh hieu) OR (ninh viet)) ((qua danh) OR (qua dan)) cua nguoi viet nma hoc tieng han.
• The words AND, OR and NOT may confuse the search; try adding quotes: "giao ((trinh hieu) or (ninh viet)) ((qua danh) OR (qua dan)) cua nguoi viet nma hoc tieng han".
• Adding a wildcard symbol may retrieve word variants: giao ((trinh hieu) or (ninh viet)) ((qua danh) OR (qua dan)) cua nguoi viet nma hoc tieng han*.