"tight relations" is a correct and usable phrase in written English.
It refers to a strong or close connection between two people, groups, or countries. Example: The two countries have maintained tight relations for over a century, with strong economic and political ties.
The issue has resonated less with voters because salaries have roughly kept pace with inflation, thanks to the Peronist government's tight relations with union chieftains.
"Brad has tight relations with HBO — he teamed up with Ryan Murphy last year to produce the HBO movie The Normal Heart.
A third leading contender, Alpha Condé, 72, was a longtime exiled opponent of Mr. Conté, but is thought to be somewhat weakened by the many years he spent in Paris, where he developed tight relations with French officials.
Besides, his country hosts a big American military base that has been critical in the Iraq war, as well as to satellites of a number of American universities, and the emir cultivates tight relations with this country.
It doesn't have the whole Atlantic alliance with the European Union or tight relations with Japan, South Korea, Singapore and Australia — which we can leverage if we aren't doing stupid stuff, like slapping them with steel tariffs or tearing up the Trans-Pacific Partnership.
The allegations have unwound the tight relations between the French Republic and Gabon; embarrassed France's executive branch; and shaken the enduring notion of Françafrique, the idea that France's special dominion in Africa did not end with the independence of former French colonies.
Computational biology contributes to a variety of areas related to life sciences and, due to the growing impact of translational medicine - the scientific approach to medicine in tight relation with basic science -, it is becoming an important player in clinical-related areas.
directly sheds light on the functional traits of populations, in tight relation with their interaction with the environment in its biotic and abiotic dimensions.
"I was showing this to the students this morning: if you look at GDP and life expectancy, at very low levels of GDP, in-country there is a tight relation.
To support collaborative work, it provides remote data access and allows users to share resources that, instead of being exchanged or stored centrally, remain active at their source in tight relation with business processes.
The company has a tight relation with Apple but "it's not FoxConn".
