Perhaps you should try some spelling variations:
mather chem » mather cam (Expand Search), mather chad (Expand Search), mather em (Expand Search)
maier biol » maier viola (Expand Search), maier i.l (Expand Search), maier il (Expand Search)
j mather » j mathew (Expand Search), j maher (Expand Search), j matthew (Expand Search)
biol med » biol res (Expand Search), mol med (Expand Search)
maier a » maier _ (Expand Search)
j mater » j matear (Expand Search), j mateo (Expand Search), j mattera (Expand Search)
a maier » _ maier (Expand Search), a mailed (Expand Search)
chem b » chem _ (Expand Search), khem b (Expand Search), chem a (Expand Search)
a med » a mmed (Expand Search), a mid (Expand Search), j med (Expand Search)
mateu » mateo (Expand Search), mates (Expand Search), mated (Expand Search)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( j mather chem b maier a med ) or ( ((j mater) OR (j mateu)) (ochem or ochen) a maier biol med ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( j mather chem b maier a med ) OR ( ((j mater) OR (j mateu)) (ochem OR ochen) a maier biol med )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( j mather chem b maier a med ) or ( ((j mater) OR (j mateu)) (ochem or ochen) a maier biol med ))".
• Adding a wildcard symbol may retrieve word variants: (( j mather chem b maier a med ) or ( ((j mater) OR (j mateu)) (ochem or ochen) a maier biol med ))*.