谷歌学术搜索查询中双引号的问题

Question

我在谷歌学术搜索中使用下面的代码时遇到问题。 “数据可用性”周围的双引号未出现在搜索查询中。有人对此问题有任何解决方案吗？

r 脚本

search_pre="(\"osf.io\" OR \"data availability\")"

journal=paste(" source:'","The Proceedings of the National Academy of Sciences","'",sep="")

search<-paste('https://scholar.google.com/scholar?hl=en&q=',search_pre,journal,sep="")

browseURL(search)

# I also tried the following scripts, also doesn't work 
search_pre="('osf.io' OR 'data availability')"

journal=paste(" source:'","The Proceedings of the National Academy of Sciences","'",sep="")

search<-paste('https://scholar.google.com/scholar?hl=en&q=',search_pre,journal,sep="")

browseURL(search)