The search is strictly based on the file names of the documents
The file name structure is as follows: product name – country – language.pdf (e.g. "Santoflex(TM) 134PD-Austria-German.PDF")
You can use a single keyword or phrase with space (e.g. "santoflex" or "ot 33")
You can use multiple keywords, with the '+' sign (e.g. "CRYSTEX +cure +English")
You can also use '-' sign to exclude keywords (e.g. "santoflex -Italy")