The phrase "and attempted to maintain" is correct and usable in written English.
You can use it when describing efforts made to keep or preserve something, often in a context of struggle or challenge.
Example: "She faced numerous obstacles but remained focused and attempted to maintain her composure throughout the meeting."
Alternatives: "and tried to uphold" or "and sought to preserve".
Owen resigned and attempted to maintain a "continuing SDP" with two supporters in the House of Commons.
The NBS has compiled the data from the Annual Report of Industrial Enterprise Statistics and attempted to maintain consistency and accuracy in data collection and process in terms of time, region and industry (Zhou and Li 2008; Yi et al. 2013).
Because of the conditions, many Continental soldiers agreed to join Loyalist regiments, but Hogun and other officers set up courts martial in the camps and attempted to maintain a dignified military structure.
Matilda presented herself as continuing the English tradition of centralised royal government, and attempted to maintain a government in England parallel to Stephen's, including a royal household and a chancellor.
The experimenter isolated the tested joint and attempted to maintain a steady speed for each trial.
All participants lost at least 4 kg after a 6-month weight-loss phase and attempted to maintain weight loss during the subsequent 12 months.
The last few months have been jam-packed as I've balanced coordinating Dance Marathon, six classes, and attempting to maintain a social life and get more than five hours of sleep a night.
There can be a trade-off between getting close to the situation under investigation and attempting to maintain an appearance of impartiality (usually associated with traditional, objective scientific methods).
How participants handle their worries, anxiety and sadness can be categorized into seven sub-themes or management strategies: Making things easier in everyday life, Banishing thoughts about the approaching loss, Living in the present, Adjusting to the sick person's situation, Distracting oneself by being with others, Shielding the family from grief, and Attempting to maintain hope.
In developing ISPO, the state realised it was difficult to obtain international recognition as RSPO had and, therefore, attempted to maintain and recover its coordination character.
"Christendom and Islam" begins to lay out the complexity of the relationships through a study of how Mudejares, Muslims living in Christian Iberia, lived together with Christians and simultaneously attempted to maintain Muslim identity.
