the festival took place in a remote area. A lot of people attended it.    (Though)
=> Though the festival took place in a remote area, a lot of people attended it.
the film has a silly plot, but many people enjoyed it.    (although)
=> Although the film has a silly plot, many people enjoyed it.
she was young, but she won the Oscars twice.     (however)
=> However young she was, she won the Oscars twice.
mr.nam travelled to Da Lat by plane last year.       ( flew)
=> Mr. Nam flew to Da Lat by plane last year.