no matter whether?

[ohmyrichard]

Can we use "no matter whether" as in "When you try to recall your own past, you realize you have learned a lot through experience no matter whether the experience brought you failure or success, sorrow or happiness", which is taken from an English writing coursebook compiled by several Chinese university teachers. I've searched the Internet for this usage and I've got numerous results. It seems "no matter whether" can be used. But in my dictionaries I see no such example sentences. I myself like to use only "whether" instead. I'd like to be clear about this usage.
Thanks in advance.
Richard

[tedtmc]

'No matter' means 'it does not matter'.
'No matter whether' means 'it does not matter whether'.
So, I think the phrase is correctly used.

not a teacher

[RonBee]

Re:

When you try to recall your own past, you realize you have learned a lot through experience no matter whether the experience brought you failure or success, sorrow or happiness.

You can delete "no matter" and lose nothing. It is superfluous.

[ohmyrichard]

Re:

When you try to recall your own past, you realize you have learned a lot through experience no matter whether the experience brought you failure or success, sorrow or happiness.

You can delete "no matter" and lose nothing. It is superfluous.

So, you mean either "no matter whether" or "whether" works, though "no matter whether" is superfluous. Then what do you think of "no matter if"? Why do my Longman and Oxford dictionaries not list "no matter whether" and "no matter if", but only "no matter what/ who/where/ how,etc."? When we non native speakers try to express ourselves in English, we need to grope our way with great caution all the time. If at some point we are careless, we will fall into a trap. Do we need to be so cautious? Thanks.
Richard

[Raymott]

So, you mean either "no matter whether" or "whether" works, though "no matter whether" is superfluous. Then what do you think of "no matter if"? Why do my Longman and Oxford dictionaries not list "no matter whether" and "no matter if", but only "no matter what/ who/where/ how,etc."? When we non native speakers try to express ourselves in English, we need to grope our way with great caution all the time. If at some point we are careless, we will fall into a trap. Do we need to be so cautious? Thanks.
Richard

"no matter whether" is not superfluous. "no matter" is, as RonBee said.
Perhaps this is precisely why your dictionaries do not include "no matter whether" and "no matter if".
However, in the constructions "no matter what/ who/where/ how, etc." the "no matter" is not superfluous.
As far as falling into traps if we are not careful goes, I think that applies to learning any new language!