Perhaps you should try some spelling variations:
heats » heads, seats, beats
cheats » cheads, cseats, cbeats, cheaps, wheats, chats
heat » head
cheat » chead, cheap, wheat, chat
cheath » cheadh, cheaph, wheath, chath, sheath, creath, cheatham, cdeath
heath » headh, death
solution » solutions

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: ((heats OR heat) OR ((cheats OR cheat) OR (cheath OR heath))) of mixing AND solution.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((heats or heat) or ((cheats OR cheat) or (cheath or heath))) of mixing and solution".
• Adding a wildcard symbol may retrieve word variants: ((heats or heat) or ((cheats OR cheat) or (cheath or heath))) of mixing and solution*.