A business can "grow successful" with respect to different aspects, including:
- just making more money (without further details)
- acquiring new property (buildings, other companies stocks, and so on)
- involving new operations a company have not been fulfilled before
- appearencing on new markets (for example, in other countries)
Can phrases to extend business and to expand business interchangeably convey all of these meanings or are they only restricted to some of them?
Google Ngram Viewer indicates the phrase to expand business is in use in far larger measure than to extend business nowadays. Unfortunately, this fact tells a little about what is the meaning speakers imply.
Here a related example where not a business as a whole but its operations are under discussion:
They expanded their retail operations during the 1980s.
Is this sentence concerning a rise in number of retail operations or an appearence of new types of retail operations?