Any websites for useful diplomatic phrases?
What I mean by "diplomatic phrases" includes
phrases that are commonly used to proceed a negotiation/discussion in a diplomatic manner
"No offence", "at the risk of sounding boring/preachy etc", "in defense of someone", "don't get me wrong, it's just that...", "I know where you're coming from." and so forth.
how to say negative things with positive reinforcement or decline offers/suggestions nicely
"I must not be making myself clear." instead of "You are misunderstanding what I said."
"Your work was not up to their standard." instead of "You failed."
Do you know any websites for those expressions?