Assuming cell A1:
Under Validation, choose Custom. Input this as your formula:

=AND(LEN(A1)=10,OR(LEFT(A1,2)="NW",LEFT(A1,2)="UP" ,LEFT(A1,2)="DN"),OR(MID(A1,3,2)="NR",MID(A1,3,2)= "WR"))
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Best Regards,

Luke M
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"aditya" wrote:

i want to do 2 data validation at a time for same cell e.g.

(1)text length should be exactly 10
(2)First two letter should be either of 'NW" OR "UP" OR "DN"
(3)Next two letter be either of "NR" OR "WR"
(4)Rest 6 can be anything

e.g. UPWR123421
DNWR12/345