ISBN already in database but search doesn't find it

[Dana]

I tried to add "What's Happening in the Mathematical Sciences, Vol. 7" and "What's Happening in the Mathematical Sciences, Vol. 8" to my author profile. The computer said that it could not do that because the ISBN numbers are already in the database. Therefore it said that I should do a search for those two books.
However, when I follow the directions and search for them, they do not show up. The only ones that show up are volumes 1-6.
I co-wrote volume 6 and it does show up on my author profile. However, volumes 7 and 8 do not show up and I want to add them. What can I do?
If you'd like to know the ISBN numbers, they are as follows:
Volume 7: ISBN-10 0-8218-4478-4, ISBN-13 978-0-8218-4478-6
Volume 8: ISBN-10 0-8218-4999-9, ISBN-13 978-0-8218-4999-6

Thanks very much for your assistance.

[lafon حمزة]

When searching by ISBN I find it.
Edit: Oh I see what happened. Because there wasn't a distinct "Volume" added to the title someone combined it with volume 6.
Hmmm... Someone also combined volumes 6 and seven together even though both have the specific volume in their title. Should be fixed now though.