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Imam Jafar e Sadiq (as) had expressed surprise ,that why when in need Momins do not use the 4 SIMPLE EFFECTIVE DUAS available to them ...........

These are quranic ayats ,immediately(fa) after these ayats follows that ayat which is the solution for the problem so we recite only the previous part of the ayat.(ie the transliterated part)
1. To overcome fear of Authority/ruler
”Wa Ufawwizu Amree ilallaah inallaaha baseerun bil ibad” (Ch. Al-Ghafir, or Mu’min (40), vs. 44)
So you shall remember what I say to you, and I entrust my affair to Allah, Surely Allah sees the servants.


2. For Rizq (sustenance)
”Mashaallahu laa Quwwata illa billah" (Ch. Al-Kahf (18), vs. 39)
And wherefore did you not say when you entered your garden: It is as Allah has pleased, there is no power save in Allah? If you consider me to be inferior to you in wealth and children


3. For Sorrows/sufferings
La ila ha illa anta subhanaka inni kuntu minazzalimeen(Ch. Al-Anbiya (21): vs. 87)
And Yunus, when he went away in wrath, so he thought that We would not straiten him, so he called out among afflictions: There is no god but Thou, glory be to Thee; surely I am of those who make themselves to suffer loss.


4. Other issues/Needs
Hasbunallah wa ni'mal wakeel(Ch. Aale I’mraan (3), vs. 173)
Those to whom the people said: Surely men have gathered against you, therefore fear them, but this increased their faith, and they said: Allah is sufficient for us and most excellent is the Protector.


There are some preconditions for it to be accepted ,eg:a person is to be married before he can pray & wish for a child.:-
a. Taqwa -Fear of Allah swt
b. Efforts & Perseverance.Efforts like that of Sarah between safa & Marwah & Patience in not giving up &continuing upto 7 rounds
c. Conviction that it can work & not an attitude of 'what can one line do'

This will inshallah result in rewards beyond imagination ,like zam zam though what was asked was only a cupful!