"make concrete efforts" is correct and totally usable in written English.
You can use it to describe a determined and organized approach someone is taking to achieve a goal. For example, "In order to get a promotion, she made concrete efforts to learn new skills and seek out new opportunities."
"If we don't make concrete efforts," he said, "the future local population will speak Japanese, Chinese or Korean".
Mr. Karzai promised to make concrete efforts to reduce corruption and find a way to end the fighting in his country, echoing pledges in the past.
There, poor nations agreed to fight corruption and improve governance, and rich nations committed to "make concrete efforts" toward giving 0.7percentt of their national income in aid.
They agreed (the United States among them) to "urge the developed countries that have not done so to make concrete efforts towards the target of 0.7% of GNP as ODA [official development assistance] to developing countries".
China's Foreign Ministry welcomed what it called "positive steps" by both sides and said it hoped they would "take advantage of this opportunity and make concrete efforts in improving bilateral ties, and realize denuclearization of the peninsula," according to spokesman Geng Shuang.
Law enforcement leaders must recognize that key members of the community may not even sit at the trust-building table until they observe law enforcement leaders making concrete efforts to address the issues.
Over the past several years, the medical community in particular has made concrete efforts to curb the improper use of antibiotics.
Therefore, an effort should systematically focus customers on a manageable set of considerations and make concrete, evidence-based recommendations.
They make concrete pipes and manhole components.
"China and India have to make more concrete efforts to keep bilateral economic ties healthy and sustainable because issues like trade imbalance, a lack of direct investments and latent security threats are yet to be resolved," he argues.
