Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trang, lanh tranh
hanh trinh » canh tranh, hanh chinh
hien xanh » hien hanh, hien nhanh, chieu xanh
dung song » dung dong, vung song, dong song
dung cong » dung trong
van than » van thanh, van thang, van tuan
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - ((hanh tranh) or (hanh trinh)) qua ((dung song) or (dung cong)) van than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - ((hanh tranh) OR (hanh trinh)) qua ((dung song) OR (dung cong)) van than cap.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - ((hanh tranh) or (hanh trinh)) qua ((dung song) or (dung cong)) van than cap*.