Tips for the Search
The search engine behind CTAN provides some powerful features to express the search. You can use these features to get better results. Some of the features are described here. This feature list is by far not complete. It will be extended when required.
The search term is split into words. The search finds all hits where all words are contained in. The order of the words just influences the order of the hits. The comparison is performed case-insensitive.
The meta-characters * and ? can be contained in the search term to denote an arbitrary number of characters and a single character respective.
Note that wildcards are not allowed at the beginning of a word.
Prefixing a word by - or NOT (in upper case) will exclude all hits for this word from the results.
sudoku NOT related
A boolean query can be formulated with the operators AND, OR, and NOT. Parentheses can be used to group sub-expressions.
tex AND NOT knuth
If you are not sure about the spelling of your search you can initiate a fuzzy search. For this purpose append a ~ to the search word. This search also returns hits which are not literal matches but variations thereof.
Note that fuzzy searches usually return lots of hits. Thus be careful.