Manual stress control with special symbol "+"

I have Russian dataset, where directly point stress letter with special symbol “+”.

Example:
wav1|Тогд+а у мен+я
wav2|+Это б+удут вес+ёлые дн+и

After training it doesn’t work. tts generate same wav’s for words with different stress: “тв+орог твор+ог”.

I think it’s happened because I don’t specify anything in VOCABULARY PARAMETERS in config file. Where I can read about the rules of VOCABULARY PARAMETERS?

Is this config good for Russian?

// VOCABULARY PARAMETERS
// if custom character set is not defined,
// default set in symbols.py is used
// “characters”:{
// “pad”: “_”,
// “eos”: “~”,
// “bos”: “^”,
// “characters”: "АБВГДЕЁЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯабвгдеёжзийклмнопрстуфхцчшщъыьэюя!’(),-.:;? “,
// “punctuations”:”!’(),-.:;? ",
// “phonemes”:“iyɨʉɯuɪʏʊeøɘəɵɤoɛœɜɞʌɔæɐaɶɑɒᵻʘɓǀɗǃʄǂɠǁʛpbtdʈɖcɟkɡqɢʔɴŋɲɳnɱmʙrʀⱱɾɽɸβfvθðszʃʒʂʐçʝxɣχʁħʕhɦɬɮʋɹɻjɰlɭʎʟˈˌːˑʍwɥʜʢʡɕʑɺɧɚ˞ɫ”
// },

Could some one share how to implement stress control? Any language.