I came across some Samoan records in FamilySearch World Miscellaneous Collections for American Samoa and Samoa. American Samoa Births, 1534-1983, 970 records, Samoa Marriages,1662-1945, 61 records
Last search I used was putting "Samoa" in both Location Boxes of "Birth" and "Death" and hitting "Enter" and using the filter.
You may just have to play with the filter and see what results you get.
Below are the links to the pages.
World Miscellaneous Births and Baptisms, 1534-1983
World Miscellaneous Marriages, 1662-1945