Search for a cluster of abbreviations (multiple abbreviations for individual words in a row). If you add spaces (not at the end), e.g. 'D M', these will be taken into account provided the 'spaces relevant' box is checked. The most common solution will in this case be 'Dis Manibus' if the 'exact' box is checked, followed by 'dolo malo'. If the exact box is unchecked, the second result will be 'Dis Manibus sacrum', because now all abbreviation clusters including 'D M' are also listed. If you uncheck the 'spaces relevant' box and do not add spaces, e.g. 'DM', you will find all possible solutions for the cluster exclusively consisting of D followed by M, at least if you leave exact on. This will include 'Dis Manibus' as well as 'deum', but not 'Dis Manibus sacrum'. If you uncheck 'exact', 'Dis Manibus Sacrum' will again be included in the results. Finally, if you type spaces and uncheck the 'spaces relevant' box, the spaces will be automatically removed from your search query.