How to rank exact occurrences higher in PostgreSQL?

Question

PostgreSQL

For example, there are entries, for example: "Stephen" and "Steve".
If you make such a request, then the records have the same weight and they can be in the output in any order.

SELECT * FROM offers WHERE to_tsvector('russian', name) @@ plainto_tsquery('russian', 'стивен');

The to_tsvector function truncates both words to "steve"

# select to_tsvector('russian', 'стивен');
-[ RECORD 1 ]---------
to_tsvector | 'стив':1

How can I make the exact occurrence of "steven" appear higher?