Perhaps you should try some spelling variations:
relational language » rational languages, national language, regional language
22latin language » latin language, relation language, plain language
2f grammar » 22 grammar, 26 grammar, 27 grammar
1720 early » 1727 early, 1820 early, 1770 early
2 grammar » 2 grammars, _ grammar, a grammar
2f early » 24 early, 20 early, 21 early

Try widening your search to All Fields.

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

• If you are trying to use Boolean operators, they must be ALL CAPS: %((22latin language) OR (relational language)) %((2f grammar) OR (2 grammar)) %((2f early) OR (1720 early)) works to 1800%22.
• Adding a wildcard symbol may retrieve word variants: %((22latin language) or (relational language)) %((2f grammar) or (2 grammar)) %((2f early) or (1720 early)) works to 1800%22*.