Try the free search tool at https://www.familysearch.org/search/hr/search/
- you have to register on their site, but it is free https://www.familysearch.org/register/custom/1
Put as much as you know in the search field - and you might come up with records such as birth/marriage/death/census etc for your ancestors. In the date fields, it's often best to start with a 'range' rather than an exact date ie. born june, 1886 - use 1885-1887 or wider. Census records are often useful in finding siblings, parents, etc.
Here is an example of a marriage record for you ancestors:
Source:"Virginia Marriages, 1785-1940," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:XR37-35X
: 11 February 2018), John Luther Goss and Rebecca Jewell, 27 Dec 1915; citing Co., Va, Tazewell, Virginia, reference P237 L315; FHL microfilm 34,214.
Virginia Marriages, 1785-1940
: Name John Luther Goss
: Age 29 Birth Date 1886
: Marriage Date 27 Dec 1915 Co., Va, Tazewell, Virginia
: Spouse Rebecca Jewell
: Age 19 Birth Date 1896
Fathers Albert Jewell Mother Jane Jewell
More records of John L. Goss are here: https://www.familysearch.org/search/record/results?count=20&query=%2Bgivenname%3A%22john%20luther%22~%20%2Bsurname%3Agoss~%20%2Bbirth_place%3Ava~%20%2Bbirth_year%3A1885-1887~%20%2Bspouse_givenname%3Arebecca~%20%2Bspouse_surname%3Ajewell~