It is good if we have option for the add related term into node automatically while node creation with related term of particular term for eg..

Vocab A:
Term-a1
Term-a2
Term-a3

Vocab B:
Term-b1
term-b2
term-b3

Relation : Term-a1 -> term-b1, term-a2->term-b2

Vocabl A is enabled in page type:

and if i create page with term "Term-a1" then system automatically add it's related term into node .. so if i search node with "term-b1" then also i can find page created with "Term-a1"