Examples of using To occur when in English and their translations into Vietnamese
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                        Colloquial
                    
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                        Ecclesiastic
                    
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                        Computer
                    
migrating from Gmail/Google Apps, email duplication is known to occur when labels are used in the Gmail/Google Apps mailbox and/or when  a folder called[Gmail]
With respect to  discovering your self, Scott Peck, the author of The Road Less Traveled, said that,"The truth is that our finest moments are most likely to occur when we are feeling deeply uncomfortable, unhappy, or unfulfilled…".
it is thought to occur when environmental factors(or triggers)
I like the way M. Scott Peck put it in his book The Road Less Traveled,“The truth is that our finest moments are most likely to occur when we are feeling deeply uncomfortable, unhappy, or unfulfilled.
migrating from Gmail/Google Apps, email duplication is known to occur when labels are used in the Gmail/Google Apps mailbox and/or when  a folder called[Gmail]
of each living creature, misfortunes with a person begin to occur when he stops honing his skills or refuses to  follow a destination.
for 80% of transmissions, although super-spreading can still be said to occur when super-spreaders account for a higher or lower percentage of transmissions.[2]
A rash starts to occur when the fever ends.
Errors start to occur when opening many windows/applications.
Which sometimes has to occur when you have a kid.
This behavior is likely to occur when interest conflicts rise.
This does not necessarily have to occur when someone is old.
What risks are likely to occur when you feed them?
The flashes are more likely to occur when the eye moves.
Adverse reactions are more likely to occur when dosage is increased.
Dreamlike states are said to occur when large quantities are consumed.
We know bullying is more likely to occur when teachers aren't watching.
(7) Engine failure is likely to occur when the engines are operated at.
Side effects are more likely to occur when using the oil in higher concentrations.