In comments under this answer to Who is “Nine Lives Man”? (Push Comic) bronze sculpture I'd originally thought that manhua was an automatic spelling corrector's interpretation of a word meant to be manga (also discussed in the post) but another user took the time to comment and explain the difference between those two and manhwa as well.
While they suggest that:
The characteristics, commonalities and differences of each of the three could probably fill several thesis papers
they did a great job in a long comment. However, comments must be considered temporary and it's hard to find them just searching the site, so I thought I'd provide an opportunity to permanentize a useful discussion of the three terms as they relate to this site, and how to choose between them.
I'll note that there is a manga tag (180+) but I don't know if it applies to manhua and manhwa as well. Hopefully answers were will provide some guidance to there as well.
Potentially related: Is unrealistic anime or manga automatically considered sci-fi/fantasy?
Related in Anime SE, but brace yourself before reading: What's the difference between manga, manhwa, and manhua? (thanks to @AndrewT. for pointing to the link)