More and more people are becoming capable of reading Taoist material in Chinese, so on the internet , how to search and identify the right content, needs some guidelines:
1) Nearly most of Taoist books and material can be found free or free to download online, some websites are especially abundant in such contents : baidu.com ; sina.com; 360.com..etc provided that you can input the right words;
2) Many contents of Neidan ( internal Taoist alchemy ) are in fact hidden in TCM writings, so in order to find them , sometimes you better search for TCM contents, not Taoist alchemist , especially you are oriented to find some cure for certain disease or you are in fact interested in medical qigong;
3) Taoist alchemical material written in or before the Yuan Dynasty, owing to full of strange jargons : tiger, dragon, lead, mercury ,baby..etc, are in fact, unreadable to most Chinese, not to speak of foreigners, so better choose those written after that period , ie, material written in Ming or Ching Dynasty. Besides, the language used is a little close to the modern Chinese, so they are likely easier to understand .
4)Material written after 1949 , year of the Communist takeover, although full of scientific terms, most of them are unlikely to be useful .. I mean if you are searching for the essence of Taoism ; if you are searching for material related to medical qigong, then it is another story.