Best Investigation movies of 1970s

Actors : Carol Kane, Harriet Andersson, Jon Finch, Ángela Molina,
Directors : José Luis Borau,

English scholar visits a small Spanish town in the Andalusian mountains to investigate the disappearance of another English scholar long ago. He learns of the legend of Sabina, a mysterious dragon woman who becomes his obsession.

Actors : Dana, Tony Liu, Nancy Yen, Evelyne Kraft,

Three female detectives--from Hong Kong, Korea, and Singapore--go undercover in a cabaret to expose a murderer.

Actors : Guilin Li, Xiuwu Li, Ke Wei, Jia Liu,

People's Liberation Army soldier Ge Luo investigates the case of the Black Face Bandit among the Hani minority in 1948.

Actors : Eun-ju Im, Tao Chiang, Man Ting Cheung, Bruce Le,
Directors : Joseph Kong,

Sergeant Li teams up with an Interpol agent investigating the death of his brother, He's not Harry, Riggs or Carter, his name Called Bruce and he's seeking revenge.

Actors : Sven Lindberg, Ernst Günther, Ingvar Kjellson, Ewa Fröling,
Directors : Jan Halldoff,

A stripper from Club Chez Nous is murdered. The killer contacts a newspaper to whitewash himself. Two journalists start to investigate the case and stumble on other crimes along the way.