public String getSearchResultWord(String search) throws IOException {
		if (search.isEmpty())
			return null;
		if (this.searchResult == null)
			setSearchResult();
		String result = searchResult.getResult(search);

		if (result == null) {
			try {
				// あいまい検索
				result = WikiUtil.getAimaiSearchResult(search);
			} catch (IOException e) {
			}
			// あいまい検索でもダメならIOException
			if (result == null)
				throw new IOException();
		}

		if (!search.equals(result))
			updateSearchResult(search, result);
		return result;
	}