The phrase "a thorough idea of the" is correct and usable in written English.
It can be used when discussing someone's understanding or comprehension of a particular subject or topic.
Example: "To succeed in this project, you need to have a thorough idea of the market trends and consumer behavior."
Alternatives: "a comprehensive understanding of" or "a deep insight into".
Try on as much as you can and study yourself in the dressing room mirror to get a thorough idea of what flatters you most.
This will help the specialist to have a thorough idea about the thickness and properties of your hair which would help them to decide the radiation intensity to use.
This gives potential subscribers a way to look through multiple copies of your newsletter for a more thorough idea of what they will receive by signing up.
Marie Diamond at Think Progress Justice undertakes a thorough debunking of the idea that everyone executed in Texas in the past decade or so was guilty: [D]uring Perry's tenure as governor, DNA evidence has exonerated at least 41 people convicted in Texas, Scott Horton writes in Harper's.
In Sept. 2013, Xinhua reported that Premier Li had read my book "The Third Industrial Revolution" with great interest and had instructed the National Development and Reform Commission and the Development Research Center of the State Council to read the book and follow up with a thorough study of the ideas and themes it puts forth.
Testing this idea requires a thorough analysis of the molecular circuits in a well-known model organism and a comparison of these circuits to those in other living beings.
The F1 commission voted in the idea earlier this year but, following a thorough review of the potential difficulties, that too has been axed.
Incorporating comparative ethnographic study into a thorough analysis of the period, Kwon upends cherished ideas about the global and their hold on contemporary social science.
A pragmatic approach to coding combined prior codes, developed from the research objectives and prior knowledge, with codes that emerged through a thorough reading of the data and reflected participants' language and expression of ideas.
The Ancillary series is mature, literate SF of a high calibre, written by someone with a thorough knowledge of the genre's tropes and an ability to present complex ideas in a thought-provoking and entertaining way.
