Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh chao » trinh chat, trinh han, trinh co
tranh nghe » trinh nghe, anh nghe, hanh nghe
thu hanh » thu thanh, thuy hanh, thi hanh
thu canh » thu cong, thu ban, thu hang
chao li » hao li
dan hoa » danh hoa, dan hoat, dan khoa

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

• If you are trying to use Boolean operators, they must be ALL CAPS: "((\"thu hanh trinh chao li hoc\") or (\"((thu canh) OR (thuc hanh)) tranh nghe dan hoa\"))".
• Removing quotes may allow a broader search: (( thu hanh trinh chao li hoc ) or ( ((thu canh) or (thuc hanh)) tranh nghe dan hoa )).