"do thorough research" is correct and usable in written English.
You can use it when you are referring to the process of studying a subject in greater detail and examining all available information. For example, "Before making a decision, it's important to do thorough research on the topic."
He doesn't always do thorough research before putting out an analysis".
"You should do thorough research on dogs because people in the West live with dogs," he adds.
People should do thorough research before making investment decisions and verify all information before acting on it".
Whether young people are drawn to school leavers' programmes or are considering a part-time course, they should do thorough research, says careers adviser Susan Burke.
"I wish the unique energy of Shahbag could be channelled into the energy and desire to do thorough research, digging out solid evidence that can result in fair trials that do not require government contortions".
But he has important advice for public services going through the same process: do thorough research and understand the "implications of running as opposed to being part of a large team".
Although her treatment of McDaniel's life is somewhat awkwardly written and academic more a thesis than a biography she has done thorough research.
Although her treatment of McDaniel's life is somewhat awkwardly written and academic — more a thesis than a biography — she has done thorough research.
Garen Gouveia, co-owner of Corporate Kids Events in Monterey, Calif., which provides child-care services for events as well as individual families visiting the Monterey Peninsula, said some hotels that referred guests to his service did thorough research on the company, while others simply added it to their list.
However, in retrospect I would recommend doing thorough research before embarking on a course, because content differs across institutions and it may not be what you expect!
