有没有什么方法可以突出显示(g) Vim 中的多个搜索？

Try "Highlight multiple words", which uses matchadd().

MultipleSearch2 is another script which is integrated with vim's search: http://www.vim.org/scripts/script.php?script_id=1183

MultipleSearch : Highlight multiple searches at the same time, each with a different color.

http://www.vim.org/scripts/script.php?script_id=479

:Search <pattern1> //will highlight all occurences of <pattern1> in the current buffer.
A subsequent :Search <pattern2> will highlight all occurences of <pattern2> in the current buffer.

This can be done manually, without any script, for two search patterns.

:match Search /pattern/
:match Search /<CTRL-R>/   # highlight the current search pattern

Search is the name of the highlight group, use the completion to select another group to highlight with a different color.

 :match <TAB>
:match <TAB>    # completion will list all highlight group

This an be handy when you cannot use your own vim configuration.

:match none      # clear the match pattern to stop highlighting

Yes, out-of-the-box you can use matchadd().

To add a highlight, eg. for trailing whitespace:

:highlight ExtraWhitespace ctermbg=grey guibg=grey
:call matchadd('ExtraWhitespace', '\s\+$', 11)

To view all matches:

:echo getmatches()

To remove matches use matchdelete(). Eg.:

:call matchdelete(7)

My Mark plugin can highlight several words in different colors simultaneously, like the built-in search. It comes with many mappings and commands, allows to persist the patterns, and supports multiple color palettes.

I prefer highlight plugin, simple and enough, can highlight different words with differently colors automatically.

http://www.vim.org/scripts/script.php?script_id=1599

For searching multiple strings in vim you can do like:

/search1\|search2

This works, and will highlight both search1 and search2, but with same color. You have to do this in vim editor.

There are two simple ways to highlight multiple words in vim editor.

1. Go to search mode i.e. type '/' and then type \v followed by the words you want to search separated by '|' (pipe).
   E.g.: /\vword1|word2|word3

2. Go to search mode and type the words you want to search separated by '\|'.
   E.g.: /word1\|word2\|word3

Basically the first way puts you in the regular expression mode so that you do not need to put any extra back slashes before every pipe or other delimiters used for searching.

:%s /red\|green\|blue/

I am not sure about how to keep different colors for different keyword though. Thanks.