Perhaps you should try some spelling variations:
trinh nhiet » trinh thiet, trinh nghien, trinh viet
trinh hieu » trinh dieu, trinh thiet, trinh thien
doanh cho » danh cho, doanh co, doanh cao
cho nguoi » cua nguoi
viet nhan » viet phan, vien nhan, viet nhat
hoc tieng » hoc hien
viet han » viet phan, viet hang, viet hoan

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