7 , ▁Ho ang ▁wrote ▁a ▁ 2 0 0 - page ▁document ▁critic izing ▁the ▁policies ▁made ▁by ▁the ▁Commun ist ▁Party ▁and ▁was ▁ja iled ▁twice ▁for ▁a ▁total ▁of ▁eleven ▁years ▁and ▁was ▁under ▁house ▁arrest ▁until ▁ 1 9 9 0 . ▁However , ▁he ▁critic ized ▁once ▁more ▁of ▁his ▁party ▁and ▁he ▁was ▁ja iled ▁for ▁a ▁third ▁time ▁in ▁ 1 9 9 5 ▁and ▁remained ▁under ▁house ▁arrest ▁until ▁his ▁death . ▁Despite ▁constant ▁government ▁surve ill ance ▁and ▁his ▁house ▁arrest , ▁he ▁would ▁continue ▁to ▁be ▁involved ▁in ▁pro - dem ocracy ▁movements ▁during ▁the ▁late ▁ 1 9 9 0 s . ▁ ▁In ▁June ▁ 2 0 0 6 , ▁he ▁react iv ated ▁the ▁Democratic ▁Party ▁of ▁Vietnam . ▁ ▁Later ▁life ▁In ▁ 2 0 0 5 , ▁he ▁began ▁to ▁experience ▁health ▁problems . ▁In ▁a ▁surprise ▁move ▁from ▁the ▁government , ▁he ▁was ▁allowed ▁to ▁go ▁to ▁the ▁United ▁States ▁to ▁receive ▁treatment ▁for ▁pan cre atic ▁cancer ▁and ▁was ▁able ▁to ▁return ▁to ▁Vietnam ▁despite ▁opposition ▁from ▁the ▁media ▁after ▁he ▁made ▁a ▁speech ▁in ▁Cong r essional ▁Committee ▁at ▁the ▁United ▁States ▁House ▁of ▁Representatives ▁on ▁the ▁situation ▁in ▁Vietnam ▁and ▁his ▁criticism ▁of ▁the ▁country ▁repr ession ▁on ▁pro - dem ocracy ▁activ ists ▁and ▁its ▁human ▁rights ▁record . ▁After ▁his ▁return ▁to ▁Vietnam , ▁there ▁were ▁reports ▁that ▁groups ▁of ▁plain - cl oth ed ▁police ▁attacked ▁him ▁at ▁his ▁home .