usually it depends if someone wants to pick up your request, or in some cases they try, can't find anything and move onto another question, in the hope that someone else can help you.
I am one of the manual or instructions experts, but in reality, I am just good with search engines. From a quick search, I reckon that you are not actually giving a full model number. That looks like '37-one', but Bing reckons it should be 37-letter I. However looking at the other Techwood model numbers they are much longer. Look at this;
Seems they are actually made by Matsui and badged Techwood?
This maybe that your television shows 'Techwood 37i' on the front, but the full model number is on the rear near the mains cable. It will also have a serial number but we don't need that.
All you have to do is Google
make model manual
make model instructions
The top site on the link below 'manualslib' is the best one. Stay away from any that ask you to download anything, or any that show a link in a PDF file. The don't have you manual and are just 'clickbait'.
Post back as a COMMENT if you need any further help, and please don't start a new post to reply to a question.