Perhaps you should try some spelling variations:
giao tinh » giao trinh, gia tinh, giao thanh
tinh hieu » tin hieu, minh hieu, tich hieu
hieu luat » hieu qua
nha thuoc » nha nuoc, nha hoc
nhan thuc » nhan luc, dan thuc, toan thuc
tieng han » tieng anh
canh cho » danh cho, canh cha, chinh cho
anh cho » danh cho, anh tho, anh co

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

• Performing a fuzzy search may retrieve terms with similar spellings: giao tinh hieu luat ((canh cho) OR (anh cho)) nguoi viet ((nha thuoc) or (nhan thuc)) tieng han~.
• If you are trying to use Boolean operators, they must be ALL CAPS: giao tinh hieu luat ((canh cho) OR (anh cho)) nguoi viet ((nha thuoc) OR (nhan thuc)) tieng han*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "giao tinh hieu luat ((canh cho) OR (anh cho)) nguoi viet ((nha thuoc) or (nhan thuc)) tieng han*".