Oracle全文搜索未搜索您好吗？。其他搜索词如Hi，Hello正在搜索
SQL代码是：
<html lang="en">
<body>
<h2 lang="fr">Imagine this is in French</h2>
<h2 lang="en">English headline</h2>
<h2 lang="en">English headline</h2>
<h2 lang="fr">Imagine this is in French</h2>
</body>
</html>