how to understand the それ+X differences I'm trying to understand when to use each [X] word, so i search on google and came out with this list: : in addition, also () : and,and then,and now : and then, after that : and, thereupon, because of that⁠⁠⁠⁠ - but, and yet, nevertheless, even so ; - well then ... , in that situation... The last two I manage to pick up, it's quite a bit like and ...but I'm having a problem to pick up the differences between the first four words. Thanks for the help, Or

According to the following sources:
A Dictionary of Basic Japanese Grammar (DBJG)
A Dictionary of Intermediate Japanese Grammar (DIJG)

: a conjunction that introduces an additional item or element. (DIJG, pag 427)
: a coordinate conjunction that connects two sentences. (DBJG, pag 422)
: a conjunction that indicates (1) temporally contiguous actions or states, or (2) a cumulative listing of objects, actions or states. (DBJG, page 416)
a conjunction to indicate that what is stated in the preceding sentence is the reason or cause for what is stated in the following sentence. (DBJG, page 413)

So each word has a slightly different meaning and usage, even though they may be translated to English similarly.
You should study the usage of each word separately.