"unusual changes" is correct and usable in written English.
You can use it when you are referring to changes that are not normal or expected. Example sentence: "We have been experiencing unusual changes in the weather lately."
I tried to follow the instructions, but I didn't experience any unusual changes in consciousness.
Two more remain in limbo due to extremely close vote counts and litigation over unusual changes to a district line.
But weather experts warned that there could be large waves and unusual changes in the currents for several hours.
The oil dividend has produced many unusual changes in addition to new sports centers and comprehensive support for the aged.
America's Food and Drug Administration FDAA) was worried by some unusual changes Posicor causes in the heart's electrical activity.
Parents will be advised to look for warning signs in children that include worsening depression, agitation, irritability, and unusual changes in behaviour.
As well as attending screening, it's important that all women are breast aware and go to their doctor if they notice any unusual changes to their breasts".
The campaign will encourage people to know what's normal for their bodies so they spot unusual changes and see their GP about possible cancer symptoms without delay.
"It's important to remember that whatever your screening history, always tell your doctor if you notice any unusual changes to your body such as bleeding between periods, during sex or after the menopause," she added.
She added: "As well as attending screening, we would encourage all women to be breast-aware and to go to their doctor if they notice any unusual changes to their breasts".
To assess whether or not a company had managed its earnings, the researchers tracked unusual changes in the major expense items that are susceptible to manipulation accounting accruals (based on subjective reserves, provisions, and estimates), R&D, and advertising expenses.
