Perhaps you should try some spelling variations:
trinh thiet » trinh viet, trinh thi
trinh hieu » trinh dieu, trinh nhiet, trinh thien
cho nguoi » cua nguoi
tieng han » tieng anh
nami hoc » dai hoc, nang hoc, nam hoi
qua dan » qua danh, qua ban, cua dan
dan cho » danh cho, san cho, dac cho
bai hoc » dai 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 (trinh thiet)) qua dan cho nguoi viet ((nami hoc) OR (bai hoc)) tieng han~.
• If you are trying to use Boolean operators, they must be ALL CAPS: giao ((trinh hieu) OR (trinh thiet)) qua dan cho nguoi viet ((nami hoc) OR (bai hoc)) tieng han.
• The words AND, OR and NOT may confuse the search; try adding quotes: "giao ((trinh hieu) or (trinh thiet)) qua dan cho nguoi viet ((nami hoc) OR (bai hoc)) tieng han".
• Adding a wildcard symbol may retrieve word variants: giao ((trinh hieu) or (trinh thiet)) qua dan cho nguoi viet ((nami hoc) OR (bai hoc)) tieng han*.