Always write out your words completely and capitalize the first letter of a sentence and proper names, use a question mark at the end of a direct question and learn to use prepositions at a site like this one What is a Preposition?.
"can u please help me for improve my english." should be written this way:
Can you please help me to improve my English? and if you are requesting help it should be written like this: Will you please help me to improve my English?