By Foo Yun Chee BRUSSELS (Reuters) – Google will have to make more concessions to settle a four-year-old probe in Europe into alleged abuse of its dominant position in the internet search and advertising business after extremely negative feedback from rivals on its current offer, the European Commission said on Monday. The move, however, casts doubts on whether European Competition Commissioner Joaquin Almunia will now be able to wrap the case up in the remaining two months of his mandate. Google has to date improved its proposal three times in response to charges from Microsoft, European publishers and competitors across Europe that it was squeezing them out in online search results and blocking advertisers from moving to competing platforms. Last week rivals stepped up the pressure on Almunia to demand more concessions, saying a proposed deal reached in February was catastrophic for them as it would entrench Googles market share of more than 80 percent in Europe.