What are the differences in the functions of the "Enter an Item to Search" and the "Search with an Option" in ACWT? Sometimes I find that the former function does work, no matter what I want to find, a word or a phrase. It doesn't work so well if I serve it with the search demand for a phrase occasinally. For example just now I wanted to find any sentences containing the phrase "the deep in thouhgt" by typing it into the box of Enter an item to search yet it found nothing at all. Then I went on to search the word "thought" with the same function. It churned out a lot of sentences with the word "thought". In the results I found that at least two sentences contained the phrase "in thought", and even one of them contained the phrase "deep in thought" which I wanted to find in the previous search. Sigh! What's wrong with the function 'Enter an Item to Search'? How shall I use it for my demand? What does the word "Item" in the function mean? Does it refer to a word or a set phrase? However, the phrase "deep in thought" can be found in nearly every reliable dictionary. Please give me some tips on the use of the functions! Thanks a lot!