fadytarek999,
Please post the name of your countries, so that people can look at them, to see what is going on.
Without being able to see the counties in question, there are three common causes for this problem...
1). Your Education Index is too low. Players advocate an Education Index of anywhere from 170-230, if you are outside this range, or at the lower end of it, then you might not be able to educate the professionals you need.
2). Your Education Priorities are poorly balanced. The total of your priorities should add up to exactly 120. Going above this has no benefit, going below, will reduce the availability of educated workers. Try raising the priority for professions you have a shortage of, while lowering other priorities, so that the total remains at 120.
3). You have too few unemployed people. When a country drops below a minimum number of unemployed in Low/Mid/High Level Workers, the game automatically demotes educated workers to bring up the uneducated workforce numbers. Note, this happens even if all automation settings are disabled.
This feature is necessary, to prevent mass unemployment due to over education. The problem is, that it doesn't demote from all professional types equally. High Tech Professionals, Nurses, and Senior Doctors, often get over demoted, resulting in shortages in those areas.
The way you solve this issue, is by making sure to have enough unemployed people, by closing extra Corporations. If High/Mid/Low Level Worker unemployment drops below 100,000 unemployed for each level of worker, or if total unemployment drops lower than 2M people, you are likely to run into this issue.
Signed President of DanNation on LU