Perhaps you should try some spelling variations:
"h. death rates investment services" » "h. death rates treatment services", "h. death rates investment choices", "h. death rates development services", "h. death notes investment services", "h. death rules investment services", "h. death water investment services", "h. death rate investment services"
"h. forest floor government services" » "h. forest floor government securities", "h. forest poor government services", "h. forest factor government services", "h. forest labor government services"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("h. death rates investment services") OR ("h. forest floor government services"))~.
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