According to the introduction link there should be syntax like:
proximity search operator:
"hello world"~10
SENTENCE operator (introduced in version 2.0.1-beta):
all SENTENCE words SENTENCE "in one sentence"
PARAGRAPH operator (introduced in version 2.0.1-beta):
"Bill Gates" PARAGRAPH "Steve Jobs"
and so on.
But when I tried them, I found that PARAGRAPH and SENTENCT appeared in results just like normal keywords, and the ~7 was also like a normal keyword 7.
Thus, these syntaxes seem not to be active, would you please to check it out, thanks.