Is it possible for so many other scripts like sh, awk, php, perl and
javascript

to keep a smallest set of their basic syntax, built-in
types, built-in operators, control structures as same as C languages's
as possible?
1) Yes, obviously. All the languages you mention are written as
linear sequences of coded characters, and thus share the exact same
"smallest set of their basic syntax."
2) No, of course not. Everyone who invents a new language wants
his language to be better than existing languages. By claiming that
existing languages are "bad," he makes his goal of being "better" that
much easier. Since he doesn't want existing bad languages to infect
his glorious new language, he scraps or twists or perverts as many
features of existing languages as he can get away with, and calls the
resulting incompatibilities a mark of his language's superiority.
3) What on Earth are you talking about?