Perhaps you should try some spelling variations:
heats » heat, heads, seats
cheats » cheat, cheads, cseats
heath » death, heat
cheath » cdeath, cheat, creath, cheatham
sheath » sdeath, sheat
cheads » heads, aheads, chears

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