As we all know, when we view PDFs with Acrobat, by using Shortcut keys "Ctrl+F", we can find the words we wanted. But I noticed that, if the words, especially Chinese characters, sorted in other order, it doesn't work well sometimes. The text layout is usually from left to right and top to bottom in the page, however, the text can be scrambled in order to achieve a beautiful design effect. If the words were arranged in a more complex form, when we wanted to find them together, the effect was not satisfactory.Please look at the following screenshots:
In the PDF file, there are two famous Chinese poems, "年年有今日" & “岁岁有今朝”. The former three pictures showed that by using "Ctrl+F", each Chinese character in "年年有今日" could be found. Theoretically speaking, all the characters in "岁岁有今朝" should be found in the same. Unfortunately, as the latter two pictures show, the Chinese characters in a horizontal arrangement coud be found, while none could be found in a verticle lines arrangement. In other words, when I press the "next" button, Acrobat popuped a dialog box saying that "No more matching items found". Obviously, the red circled Chinese characters were missing. Why does this happen?