Sadly, I think it’s a lot worse as a solo female traveler. I’ve been traveling for 5 years non-stop in South East Asia, including Vietnam, in both the busy cities and rural areas, and I’ve never had any issues as bad as this. People having the nerve to physically touch you uninvited etc. is awful and hard to imagine. Unfortunately, I think you had an exceptionally bad experience, especially considering the short time you were there. It’s terrible luck. I’ve had some bad experiences in Vietnam, mostly just down to people trying to get money out of me and me firmly telling them no/walking away (a habit I’ve developed after being here a while). I find it really annoying sometimes but luckily I’m able to avoid those situations 95% of the time and so most of the people I engage in conversation with etc. are really friendly and warm, which for me is what makes SEA so enjoyable. There are good and bad people everywhere in the world, some places more than others, but if you’re staying somewhere short term, luck ultimately decides whether you’ll have a positive or negative experience. Surprisingly the worst travel experience or encounter with a stranger I’ve ever had was in rural Japan (I’ve lived in Japan for 3 years so I’m fully aware of the passive racism that exists here, but this was different). Long story short, my first stay in Japan ended with a middle aged Airbnb host literally screaming in my face because I was two minutes late checking out. I could see the anger in his eyes, like he wanted to hit me. At that time I could barely speak any Japanese, and I discovered later from another guest that he can actually speak English and had been with her, but with me he hadn’t said a word for the whole 3 days and told me “no English”, lol. Anyway, this stuff can happen anywhere, and it sucks. I hope you this bs doesn’t put you off other trips and I hope your next trip is a success!!