Perhaps you should try some spelling variations:
trinh nhiet » trinh thiet, trinh nghien, trinh viet
luat danh » luat doanh, luat dan, luan danh
luat canh » luat doanh, luat kinh, luc canh
cho nguoi » cua nguoi
tieng han » tieng anh
nm hoc » am hoc, n1 hoc
n3 hoc » n3 doc, n1 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 nhiet ((luat danh) or (luat canh)) cho nguoi viet ((nm hoc) OR (n3 hoc)) tieng han~.
• If you are trying to use Boolean operators, they must be ALL CAPS: giao trinh nhiet ((luat danh) OR (luat canh)) cho nguoi viet ((nm hoc) OR (n3 hoc)) tieng han.
• The words AND, OR and NOT may confuse the search; try adding quotes: "giao trinh nhiet ((luat danh) or (luat canh)) cho nguoi viet ((nm hoc) OR (n3 hoc)) tieng han".
• Adding a wildcard symbol may retrieve word variants: giao trinh nhiet ((luat danh) or (luat canh)) cho nguoi viet ((nm hoc) OR (n3 hoc)) tieng han*.