It is correct and can be used in written English.
Example sentence: When I was having trouble understanding the assignment, I decided to seek their help.
"I don't seek their help.
Learn to use them, don't seek their help.
Mr. Joseph's is to arch his eyebrow at Mr. Schulman and at the people who seek their help.
Mr. Annan used the meeting to seek their help in defusing tensions between two of their members, Guinea and Liberia.
Psychotherapists enter their profession knowing that the patients who seek their help are sometimes at risk for suicide.
I stay engaged with other alcoholics and addicts, always, and seek their help and offer it, and that's the nature of my recovery, which is ongoing.
Ho was clearly admiring of the Americans in 1945, and he actively sought their help.
He was seeking their help in touting his dietary supplement — a "wonder product" derived from tobacco.
Labour said constituents have desperately sought their help to get a GP appointment.
He was seeking their help in touting his dietary supplement a "wonder product" derived from tobacco.
Mitchell said last month that he sent letters to current and former players seeking their help.
