Russian ⇄ Czech English French

не знать, что stresses
rhetor.	have no clue that (Alex_Odeychuk)
не знаю что
disappr.	I don't know what (здесь "что" – сущ. (не союз, не частица); нечто плохое; нечто плохо сделанное: It's I don't know what MichaelBurov)

не знать, что: 357 phrases in 30 subjects

Accounting	1
American usage, not spelling	2
Cinematography	1
Cliche / convention	1
Contextual meaning	2
Diplomacy	2
Figurative	1
French	1
General	194
Idiomatic	7
Informal	8
Intelligence and security services	1
Jargon	1
Literature	7
Makarov	83
Mathematics	1
Microsoft	1
Obsolete / dated	1
Philosophy	2
Programming	3
Proverb	10
Psycholinguistics	1
Psychology	1
Quotes and aphorisms	7
Rhetoric	8
Rude	2
Saying	2
Scientific	1
Slang	4
Teenager slang	1