If you like low risk investment or even those with no risk, your expectation of returns should be lowered.
Some alternative methods to get some interest would be by accounts such as the DBS multiplier or the OCBC 360 account which should be explored.
These accounts do have terms and conditions to fulfil thought and they can change the interest rates easily.
But let's say you've done them already or you don't like them and are ready to get invested, these are 3 possible options.