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