Wales lost their opening Group A match 2-0 at home to Belgium on Friday, and Bale says that the team need to recover quickly against Serbia in midweek.
"Our target is to pick up two wins by the end of the first four matches," he said.
"Of course, it's important to win your home games and anything you pick up away is a bonus. But we will still go for the wins away from home.
"This is a group where there is no one massive country like a Germany, France or Spain. Everyone can beat everyone."
Chris Coleman's side travel to Serbia on Tuesday, with both sides looking for their first victory of the campaign.