The data set is small. The search system is exclusively based on similarity search using word vectors. One result of this is that an image that should be return

The data set is small. The search system is exclusively based on similarity search using word vectors. One result of this is that an image that should be returned for a search for 'parrot' is only returned for a search for 'bird'. A better search system would combine both word vectors and keyword matching so that if a description contains parrot it matches parrot but bird would also match parrot.