TxnQuery.setFetchLimit-> how to fetch more than the fetch Limit?

The TxnQuery.setFetchLimit is defaulted to 150 transactions. If i have more than 150 transactions to query, how do i retrieve the next set of transactions , without re-retrieving the previous 150 transactions? I did a simple test my limiting to 1 transaction, and executed TxnQuery twice, the same txn was re-retrieved. If anyone has used logic to pull more than the fetchlimit value, please share the psuedo code.

I'm looking for a a query to retrieve all Transactions in saved status and check if Loan amount is greater than a certain dollar amount, and if so get the tracking code.

i'm not planning to make any updates in the looping, simply querying the data.

Thanks in advance.