Search Korean word & Search long-length word

I have two questions.
1. When searched Korean word (ex. 안녕, 바다), It did not get a result even if there is a korean.
I think it is Korean-language encoding problem.
And I found same problem by searching on Forum. but you sent a reply by private.
2. Searching a short word works well. but long word is not.
Is there a limit length?
When word has special characters or space, it occur native error.

Hi,

can you send us the words that give you exception and your Korean pdf so we can test it!?

255 characters limited.

1. Korean-language encoding problem >> solve, It was pdf file problem. It's not code problem

2. 255 characters limited >> solve.

Thank you for your reply~!~