John Gill's Bible Commentary Ver. 8. [Now] Manasseh had the land of Tappuah , etc.] The whole territory that went by that name, from a city of note in it, next mentioned; all the fields and villages in it belonged to the tribe of Manasseh: but Tappuah on the border of Manasseh [belonged] to the children of Ephraim ; and was one of those separate cities they had among the inheritance of the children of Manasseh; though it seems they had only the city, not the territory adjacent to it, and which was named from it.
Matthew Henry Commentary
Verses 7-13 - There was great communication between Manasseh and Ephraim. Though eac tribe had its inheritance, yet they should intermix one with another to do good offices one to another, as became those, who, though of different tribes, were all one Israel, and were bound to love a brethren. But they suffered the Canaanites to live among them, agains the command of God, to serve their own ends.
Original Hebrew למנשׁה4519 היתה1961 ארץ776 תפוח8599 ותפוח8599 אל413 גבול1366 מנשׁה4519 לבני1121 אפרים׃669