Perhaps you should try some spelling variations:
heats » heat, heads, heath
cheats » cheat, cheads, cheath, cheaps, wheats, chats
cheath » heath, sheath, creath, cheaph, wheath, chath
cheat » cheap, wheat, chat
cheads » heads, aheads, chears

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