Open MP

[Scarlet]

Hi, all!
I am trying to write my first program, using Open MP. I must search in a text using different number of threads. In order to find matches I must divide my text so that if i am searching for example the word "book" in the text "I like to read a book" thread 1 takes "I like " and searchs, thread 2 takes "to read " and thread 3 take "a book". No one thread takes a part of the word. How can I do this according to my code?
Here is my C++ code:

vector <unsigned int> bitmask;
vector <unsigned long> hits ;
int length = T.length;
	unsigned int D=0;
	unsigned int i,pos;
	#pragma omp parallel for private(pos,i),shared (length,bitmask,D), firstprivate(hits)
	for (i=0;i<T.length();++i){
		pos = istword (T[i],P,length);
		D = (((D<<1)|1) & bitmask [pos]);
		#pragma omp critical
		if(D & (1 << length - 1)){
			hits.push_back(i-length+2);
		}
	}

Thank you!