Perhaps you should try some spelling variations:
trinh thien » trinh thiet, trinh nghien, trinh tin
trinh nghia » trinh nghien, trinh nghe, trinh nha
hanh trinh » canh tranh, hanh chinh
trinh tien » trinh tieng, trinh tin, trinh dien
nghia dan » nghe dan, nghia mac, nghia xa
danh hoc » dan hoc, danh hoa, anh hoc
tu hanh » du hanh, lu hanh, thi hanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu hanh trinh nghia dan toc ) or ( thuc hanh ((trinh thien) or (trinh tien)) danh hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu hanh trinh nghia dan toc ) OR ( thuc hanh ((trinh thien) OR (trinh tien)) danh hoc )).
• Adding a wildcard symbol may retrieve word variants: (( tu hanh trinh nghia dan toc ) or ( thuc hanh ((trinh thien) or (trinh tien)) danh hoc ))*.