Search vs Seek vs Look for vs Research

Because in French we use "rechercher", there's a tendency to use "research" in the same way but it's kind of a faux-ami. It's also often wrongly used, in respects to the words around it. Here's some help

LOOK FOR (level A1)

Look for is used, in general, when you need to find something or someone. It is most common for everyday things like keys, a job, person. 

• Excuse me! I’m looking for the manager’s office. Do you know where it is?
• I’ve been looking for a job for months.

* Not to be confused with "look at" which simply means "direct your attention to".

SEARCH (level B1)

Search is used when you look somewhere carefully, because you want to find something:

• The police searched the house for evidence.
• I searched the whole room, but I couldn’t find my watch anywhere.

You can also search for something:

• We searched for a sunny spot for our picnic.

It is more thorough. More thorough, investigating (the internet, a database, a crime scene) We typically search + something/one + for something/one : 

• The police searched the house for evidence

RESEARCH (level B1)

Academic or detailed study (science, history, medicine)
We often use "do" before it. 

• I did some research on the subject for my thesis

SEEK (level B2)

Seek is not used when talking about physical objects. It refers to the process of trying to get something:

• Thousands are seeking asylum in Germany.
• I think you’ll need to seek help.

https://www.myenglishteacher.eu/blog/difference-between-search-seek-look-for/