Simplify the following text for a Grade 15 native English-speaking person.
Original: In fact , hypertext interfaces existed in the 1960s , but numerous complications have thwarted advances , such as possibly supporting search-engine `` multi-word '' scanning of any document in viewing or text-editing .
Simplified: In fact , hypertext interfaces existed in the 1960s , but numerous complications have thwarted new advances , such as new support for search-engine-style `` multi-word '' scanning of any document when viewing or text-editing .