Here are some suggestions that may be suitable for the theme names of chorus concerts:

1. "Sound of Harmony: Multi-chorus Concert"

2. "Voice of Nature: International Chorus Concert"

3. Dream Chorus: Music Feast Without Borders

4. "The Rhyme of the Four Seasons: Chorus Concert"

5. Charm of Sound: Male Chorus Concert

6. "* * *: Intercultural Chorus Concert"

7. The Brightest Star in the Night Sky: Chorus Concert

8. "Voice of the Future: Youth Choir Concert"

9. "Voice of Peace: Chorus Music from All over the World"

10. Dream Sailing: Chorus Concert

I hope these names can give you some inspiration!