The phrase "acceptable topics" is correct and usable in written English.
You can use it when referring to subjects or themes that are deemed appropriate for discussion or consideration in a particular context.
Example: "During the meeting, we will focus on acceptable topics such as project updates and team collaboration."
Alternatives: "suitable subjects" or "appropriate themes".
The range of acceptable topics and methodological approaches are wide.
As well as these unspoken external pressures, the internal norms of science unhelpfully narrowed the acceptable topics of conversation at Asilomar.
We needed to begin a dialogue: in our view, the key to creating cultural change in the firm was to turn taboo subjects at work into acceptable topics of discussion.
Revolution freed the country's estimated 5,000 officially sanctioned mosques from the rigid controls of the previous government, which appointed every prayer leader and issued lists of acceptable topics for their Friday sermons.
Whether you support it or not, if the only thing FI achieves is to keep discrimination, feminism and equality firmly entrenched in the Swedish political agenda, and to ensure that these issues are acceptable topics for broad national debate, that is an achievement for which any party should be congratulated.
In general individuals in the US seem unaware of the presence of social class, it seems to be an invisible topic unlike race and gender, which are now acceptable topics of conversation, class is just not a part of US personal identity.
If you've been specific, then it should be straightforward to create clear rules about what is and isn't acceptable, so you can have confidence removing unfair or off-topic comments.
Jealous hostility toward a romantic rival is an acceptable topic for conversation.
— becomes an acceptable topic of conversation, we take our clothes off in protest.
The history of rock'n'roll became the subject of his thesis, long before popular music became an acceptable topic for academic study.
Local health professionals received training in raising the issues with people in the Pakistani community, so that it became an acceptable topic for discussion.
