So I tried adding parent and children to my notes as @nikita.korobkin recommended me too.
My problem now is that it take long to navigate inside the hierarchy ( I have to double tap on the card title to see the children ) and the other thing is that I was trying to add inline link to each notecards but I noticed that each notecards have a limit of 1200 characters, which get used fast with inline link.
I really like using tags as keywords/buzzwords for each note, I wish I could insert them as inline tag within the notecard.
The advantage of using tag is that
1- I can find instantaneously what I’m looking for by using the tag filter (for example #Pictures cards from #Rubin’s book on #Pathology of #Liver)
2- when I’m writing a note just typing the first 3 or 4 letters bring up the tag that I’m looking for.
So as @rawkode requested, I wish inline tagging will be implemented soon .