If you are seeking a particular word or phrase and don't care about the case, there are two ways to proceed.

如果您想查找一个特定的单词或短语，但却不太关心它们的大小写，那可以使用两种方法。

youdao

When someone is knitting a scarf or a sweater the phrase knit one purl two mightfit the context, but in this case the purl is a different word spelled P U R Land comes from a source meaning “twist.”

而当某位女士针织围巾或是毛衣的时候，她所用的口诀“正一针，倒两针（knit one, purl two）”也许挺符合本文的语境。 不过，这个例子里的单词purl拼写却完全不同——P U R L ——它的来源有着“旋转（twist）”的意思。

youdao

If you want proof, turn on the sports channel. You're bound to see an athlete or two gearing themselves up with a tart phrase or scolding themselves after a bad shot.

如果你需要证据，那就打开体育频道，你一定会看到有那么一两个运动员在对自己说着鼓劲儿话，或是在没投中球后狠狠地责备自己。

youdao

Always a phrase or two about the pointlessness of the assignment in relation to the use of time and to things he might otherwise be doing: e.g.

NEWYORKER: The Tree Line, Kansas, 1934

But for the average person using web search engines, there's a really easy one that a lot of people still don't do, although the search engines have made their technologies smarter, and that's using quotations marks around two or more key words that you want to search as a phrase.

NPR: Tips for Easing Internet Information Overload