Perhaps you should try some spelling variations:
trinh nghien » trinh nghe, kinh nghiem, trinh thiet
trinh nhiet » trinh thiet, trinh viet, trinh triet
quan thanh » ban thanh, van thanh
thanh cho » thanh pho, thanh cha, thanh chu
cho nguoi » cua nguoi
vien duan » vien quan, tien duan, vien luan
hoc vien » hoc hien, hoc viet, hoc tieng
viet nm » viet nam, viet nami, viet anh
nm hoc » am hoc, n1 hoc, n3 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) OR (trinh nghien)) quan thanh cho nguoi viet nm hoc vien duan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "giao ((trinh nhiet) OR (trinh nghien)) quan thanh cho nguoi viet nm hoc vien duan".
• Adding a wildcard symbol may retrieve word variants: giao ((trinh nhiet) OR (trinh nghien)) quan thanh cho nguoi viet nm hoc vien duan*.