Perhaps you should try some spelling variations:
heats » heath, seats, beats, heads
cheats » cheath, cseats, cbeats, cheads, cheaps, wheats, chats
heat » head
cheat » chead, cheap, wheat, chat
heads » leads
chears » clears, hears, shears

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