lookup suggestion: subsequences

[Max]

Russ Cox wrote:

> Having the same order does get a sequence higher
> in the results, but they have to  be next to each other,
> not just anywhere.  So if you type in 1 2 3, then a 
> sequence with 1,2 will appear higher than one without.
> But 1,0,2,0,3 doesn't get bumped up.  Sorry.

Then I'm asking if the feature of looking for subsequence can be implemented?
Say, for query like "subseq:1,2,3" it would look only in the %S/%T/%U lines and require that all terms from the query be present in the given order but maybe interlaced with other terms.

Thanks in advance,
Max