"extend the research" is a grammatically correct phrase and can be used in written English.
This phrase is typically used to refer to the act of continuing or expanding an ongoing study or investigation. Example: In order to gain a more comprehensive understanding of the issue, we need to extend the research beyond the original scope and include a larger sample size.
These findings should encourage researchers in Asian countries to replicate and extend the research.
"I've put aside at least four years for this, but I'd love to extend the research.
Where possible, Amnesty's researchers will conduct interviews, do field research and look at satellite imagery to corroborate this information and extend the research.
McKay's group published a highly regarded paper in Science last summer showing how rat embryonic-stem cells could be used to treat a version of multiple sclerosis in rats, but he doesn't dare extend the research to test the method's effectiveness in humans.
It would be beneficial to extend the research further so as to include real systems.
In Study 2, we extend the research on revealing dress in two ways.
It is therefore essential to thoroughly understand the more new reducing agents to extend the researches on numerous fabrication and application of ZnO.
Extending the research and development tax credit would also help some businesses, but Senate Republicans have blocked that.
Maarten Goos and Alan Manning, extending the research to Britain, have more colorfully dubbed it the dual rise of "lousy and lovely" jobs.
Armed with that insight, Dr. Kabat vastly extended the research into their chemical composition and activity, including their roles as a component of gamma globulin, the fraction of blood serum used to combat infectious diseases like measles and hepatitis.
Extending the research work towards the qualitative analysis of continuum models is highly expected.
