Поиск по слову быть нужным дал один результат
RU русский VI вьетнамский
быть нужным (byt' núžnym) cần

RU VI Переводы слова быть

быть (sg: есть) đến
быть (v) [elliptical form of "be here", or similar] (sg: есть) đến (v) [elliptical form of "be here", or similar]
быть (sg: есть)
быть (v) [used to indicate that the subject and object are the same] (sg: есть) (v) [used to indicate that the subject and object are the same]
быть (v) [used to indicate that the subject has the qualities described by a noun or noun phrase] (sg: есть) (v) [used to indicate that the subject has the qualities described by a noun or noun phrase]
быть (v) [used to indicate that the subject plays the role of the predicate nominative] (sg: есть) (v) [used to indicate that the subject plays the role of the predicate nominative]
быть (v) [used to indicate that the values on either side of an equation are the same] (sg: есть) (v) [used to indicate that the values on either side of an equation are the same]
быть (n) [indicating future action] (sg: есть) sẽ (n) [indicating future action] (n)
быть (v) [occur, take place] (sg: есть) (v) [occur, take place]
быть (v) [to exist] (sg: есть) (v) [to exist]