I guess if you are in America, many places don't have a high % Asian population so you may have to relax the ethnicity requirement to broaden your search. I managed to find perhaps the one Asian woman I know who is frugal and smart with money. I married her quickly (after just 6 years of making sure she was the one). So my apologies, I may have snagged up the last one!
We met early on in college so neither one of us had any money, so maybe that helped? I imagine you can tell from the first date whether the person you are sitting across the table from falls in the frugal category or extravagant spender. If not, determine that quickly and act accordingly (if you are seeking a mate and not just a date).
Talk about things like "where would you go on vacation and what would you do". Or "what is your favorite thing to do on a lazy Saturday if you aren't otherwise engaged". Responses like "shop shop shop" or "OMG shop shop shop" are surefire indicators that they like to spend money. Make a statement like "sometimes simple picnics in the park are much more enjoyable than dinner at a high end restaurant" and see what kind of reaction you get. Responses like "I only eat at the finest of restaurants because every dining experience has to be the absolute best possible, as with everything else I seek in life" are sure to disqualify your mate from your further inquiry. You don't need to get into specifics about 401ks, savings rates, etc to determine whether you are dealing with a frugal gal.
As far as where you find these frugal women you seek? Not being in the dating scene, I am merely guessing. I would guess you don't find them at places that require spending tons of money. I would guess they don't have thousands of dollars of clothing and accessories on them at any time. Maybe strike up conversations with people in stores where you shop, on the sidewalk when you walk around. On the bus or train (if you take one).
Since you are adding an additional constraint on your search filter, you will definitely get less results so you may have to look harder. You are after all seeking a woman who is self sufficient, has reasonable earning potential, and is savvy enough about money that she isn't hooking you to support her (financially) for life.