Not exactly what you asked but here
http://www.mangago.zone/read-manga/second_to_none/ (doesn't travel in time but she is good at fighting)
http://www.mangago.zone/read-manga/light_shadow/ (doesn't travel in time but she is good with swords)
http://www.mangago.zone/read-manga/taming_a_tomboy/ (doesn't travel in time but she is good with fencing)
http://www.mangago.zone/read-manga/as_you_wish_prince/ (travels into her own webtoon and become good with swords)
http://www.mangago.zone/read-manga/sica_wolf/ (doesn't travel in time but she is something like a magician)
http://www.mangago.zone/read-manga/appetite/ (actually this one is horror, she is good at fighting and she eats people... Not so much romance, just a little bit)
any colored straight manhua where the girl lead know martial arts and is strong. Can be comedy. Preferable a fantasy one where the mc travels into the novel or smthg like that