\import, like the standard latex
\include requires each imported document to start on a new page. But if your documents are so small, you probably can just use
\input instead and input the documents (which would need then just to be the document body without the preamble). If you need to process the documents individually as well as together there are various things you can do, hard to say without seeing an example but for instance if each small document was
doc2.tex etx and
doc.tex` looked like
Then your combined document can be
Or possibly with section headings in between each document, or whatever you need....