GSM 7-bit SMS problem topic

When i try to write an sms on GSM 7-bit (140words) when i send the message i have some problems because some words dont sending.. Lets say ''Hi How are you ?'' receiver '' H Hw r yu''..... I am from greece and i use greek language i just give an example.. When i Put it on Auto (60words) its fine and i dont have problem .But i spend all my message too fast... If someone Else Have the same problem and can help me.. waiting....
Thanks for reading.