I would classify myself as a newbie but i am able to retain my profit and keep my loses to a minimum so i thought i’d share some of my thoughts.
What are the mistakes(Reasons)Makes the newbie trader can’t keep the profit?
I think this can be a number of reasons, inconsistent position sizing, lack of discipline, no definable strategy or it could be all of these reasons. I think the answer to this question is trader specific, if you look over your past trades I’m sure you can come up with a reason or reasons that apply to you 
Is 30min Time frame with No of trades 9 high?
(I have 3-4 free hours/day)
This is my personal belief but i think nine trades per day for a newbie is extremely high.Think about it, your not that experienced in the market so you wanna trade less not more. Remember you dont have to take every signal your system gives, restrict yourself to the grade A setups ie the setups your very confident about. Yeah you might miss a few trades but you’ll definitely keep your losses to a minimum.
I define & confirm trend direction, It reach to TP, So should i close the order or continue?
Well, from what i see in your trade examples, im guessing you follow some sort of MA crossover system, what do the rules tell you? Maybe if there was a strong trend you could hold on to the trade but i would move my stop to the TP price.
If i reach to TP and close my order and the trend still keeping go up, Can i open new order or not recommended?
That’s a big no i would say, if you’ve taken your profit you should be satisfied. Jumping back in to a trade just because it keeps going will certainly reduce your account in the long term. If price consistently moves passed your Tp point then adjust it.
What about negative relation like eur/usd and usd/chf, can play with that?
for example when i lose 30 pip with eur/usd i go long with usd/chf and keep both open for while like now
Again, same as before, dont open a new trade just because you lost. The net result will be negative.
On a side note, you certainly have a lot of indicators on your charts. I feel in most cases these can be a distraction and prevent you from looking properly at whats actually happening in the markets.
Take a read of daedalus’ fibonacci thread, James’ IB thread and the alternative template thread, all of which will go a long way in helping you learn understand price action.