As in Vi, searching is done by / and ?. The string will be
searched literally by default. To invoke a regular expression search,
first execute the search command / (or ?) with empty search
string. (I.e., type / followed by RET.)
A search for empty string will toggle the search mode between vanilla
search and regular expression search. You cannot give an offset to the
search string. (It is a limitation.) By default, search will wrap around
the buffer as in Vi. You can change this by rebinding the variable
vip-search-wrap-around. See Customization, for how to do this.