Calgary engineer believes he's cracked the mysterious Voynich Manuscript

[Aga Tentakulus]

"in the history of written Indo-European and Semitic languages, there were no quadruplets or quintuplets of words."

This statement is false. It only corresponds to your assumption.
The real problem is that you cannot see any punctuation marks in the VM text. If I leave out the punctuation marks, quadruples or quintuples are quite possible.
"so nimm das. Das dass das ersetzt ....."/ " so nim das das dass das ersetzt ...."   "so take that. That replaces .....".
The context is there. Difficult to understand, but possible. Even without gimmicks.
You say it often occurs in Turkish texts, but you have never shown any examples.

Translated with DeepL.com (free version)