3. Now / it / develop / into 36 dances / and / become / the symbol / solidarity / among the ethnic groups / the northwest.
=>
Now it develops into 36 dances and becomes the the symbol of solidarity among the ethnic groups in the northwest.
4. The xoe dance / performed / the boys and girls/ the hamlets.
=>
The xoe dance is performed by the boys and girls in the hamlets.
5. They / hold hands / form / a / circle / and / dance together.
=>They hold hands to form a circle and dance together.
6. Musical instruments / the dance / include / lutes / drums / two-chord fiddles / gongs / and cymbals.
=>Musical instruments for the dance include lutes, drums, two-chord fiddles, gongs and cymbals.
7. For the Thai natives / they / not need / learn the xoe dance / because / they / dance / automatically / when they grow up.
=>For the Thai natives, they do not need to learn the xoe dance because they dance automatically when they grow up.
8. Without / xoe dance / Thai boys and girls / not become / lovely couples
=>Without xoe dance, Thai boys and girls do/ can not become lovely couples.