You can use Peter Kahrel script:

A Script to Reset InDesign’s Find/Change

or Luis Felipe Corullón script:

Reset find/change dialog

To delete multiple spaces and trailing space in one click try this:
in Find: \r\K^+|+$|\K+
in Change: Leave empty

Try to use this, for example you want to search ST:
in Find: st
in Find Format: ligature

in Find: ^.+?\K(.+?)(.+?)(.+?)(?=.+$)
in Change: $1$2~y$3

Collect them in a book file and try to synchronic the styles

Use this: (?<=\().{1,4}(?=\))

In my previous answer, for some reason the quote marks appeared a question mark, use this, or put what yo need in brackets:
\d\K[\x{2019}\x{2032}\x{2033}](?!s)

To use conditional text with keep every thing without lose any thing, use this trick:
1.Make a character style with [None] Character Color
2. Use Find/Change:
in Find Format: Conditional Text
in Change Format: Your Character Style [None Color]