Getting her to qualify will get her invested in the conversation. You throw up hoops, through which she can jump through. In that way, you're not that regular guy from the library anymore, but you're Phate. You're different than other guys since you don't care about her physical beauty: You're looking for inner beauty (she has to meet up to your standards).
One short link:
http://www.pualingo.com/pua-definitions/qualification/
Point being here is that a girl always wants her friends to have a good view on who she is.
Qualifying is a big element of natural game, Mystery Method uses it to create female-to-male interest (A3)
I'll give you an example:
Situation 1: An immediate bounce should have been easiest. You could text her with: 'Are you always studying or can you take a 10-minute break?'
Note: Qualification through texting is very difficult, since you don't have the body language
Second situation is a little more difficult: Depending on how you gamed her, she may have seen this as a one-night-stand. Club game is, depending on the club, very difficult to get to see someone again: Women are drunk, partying, and in a different environment. Much flaking occurs in club game.
To reduce flaking, you'd have to qualify her, but that would be only possible if you can have a reasonable conversation together.
Again, qualifying is only about checking (or giving the impression that you do) a girl for the qualities you want in a girl.
For example: "Can you cook?" "Are you a good friend?" "What type of guys do you normally date?"
But also: "Wow, do you always hang out this much with guys you just met?"
Hope this helps.