The phrase 'that thorough' is correct and can be used in written English.
You can use it to emphasize the strength of an adjective or adverb. For example, "I studied for the exam with that thorough dedication."
The searches were not all that thorough, but they changed the atmosphere and gave everyone a sense of relief.
The Air Force maintains that thorough investigations and prosecution are the only way that cadets will realize that rape is not an infraction, but a crime.
"It is essential that thorough and credible investigations be conducted concerning these deaths with the aim of providing clarity and bringing about possible accountability," she told Sweden's parliament.
Some products were so complex, and the chains from borrower to end-investor so long, that thorough due diligence was impossible.
Divisions in Congress mean that thorough reform is unlikely anytime soon, even though some parts of the legislation could do with a second look.
Such bosses are implicitly expected to keep things as they are and owe their position to so many internal colleagues that thorough corporate overhauls are almost impossible.
Is Gulliver being naive in believing that thorough training of security agents can make air travel safer without compromising flyers' rights?
Q. Wouldn't many travelers say that thorough searches, including occasionally intrusive searches, are the price to pay for security in a dangerous world? A. They are touching parts of our bodies that are reserved for our most intimate activities.
It is essential that in the short window of opportunity that exists before reinterment, that thorough research is conducted that will be of academic and public benefit, and for posterity.
Lawyers representing corporate defendants had argued strenuously for the standard of review -- called "de novo review" -- that the court adopted today, saying that thorough appellate reviews would help curb excessive verdicts and bring consistency to an area of law in which variations in results have been wide and unpredictable.
Murdoch said: "It would have been better if I had not relied on the people who had assured me that thorough investigations had been carried out and that further investigations were unnecessary, and the statements made by the police to the same effect".
