Perhaps you should try some spelling variations:
"h. diet related investment ties" » "h. diet private investment ties", "h. diet estate investment ties", "h. diet road investment ties", "h. diet related investment series", "h. diet related investment trends", "h. diet related investment trust", "h. ict related investment ties", "h. iot related investment ties", "h. list related investment ties"
"h. forest sewage treatment services" » "h. forest sewage payment services", "h. forest wastewater treatment services", "h. forest damage treatment services"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("h. diet related investment ties") OR ("h. forest sewage treatment services"))~.
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