The phrase "a difficult approach to" is correct and usable in written English.
It can be used when discussing a method or strategy that is challenging or complex in nature.
Example: "The researchers proposed a difficult approach to solving the problem of climate change, requiring collaboration across multiple disciplines."
Alternatives: "a challenging method for" or "a complex strategy for".
This is a difficult approach to pull off, and may be one reason why many novelists shy away from the theme of global warming.
It seems to be a difficult approach to employ, but it remains one of the promising molecular approaches to be advanced in the near future.
Survival analysis, which we used in our previous analysis of complaints, 13 deals better with these issues, but has its own disadvantages: it cannot handle time-related predictor variables, risk scores can only increase, and it is a difficult approach to explain to regulators.
It is an extremely difficult approach to tackling the disease and we don't feel that it is appropriate that it is effectively being portrayed as an essential part of bringing bovine TB under control.
He does not like the par-4, 452-yard 18th; he is not one of the PGA Tour's long hitters and he faces a difficult approach shot to the green, with a pond to the left.
Devo sees Sumo Logic, Elastic and Splunk as its primary competitors in this space, but like many startups they often battle companies trying to build their own systems as well, a difficult approach for any company to take when you are dealing with this amount of data.
In addition, there is a difficult analytical approach to accurate the measures of the detection performances of the ABFT technique using wavelet codes [11, 12]. Figure 1, [13], shows the basic architecture of an ABFT system.
A more productive, though more difficult, approach is to focus on how a leader thinks that is, to examine the antecedent of doing, or the ways in which leaders' cognitive processes produce their actions.
A more productive, though more difficult, approach is to look at how such leaders think.
Oftentimes, however, there is a more difficult approach that would allow you to reach the same goal while taking more virtuous steps.
Neighborhood specification is a dominant consideration in assuring the success of a direct search approach to a difficult combinatorial optimization problem.
