Using the Asterisk [ * ] Operators
Use * as wildcard to match one or more words in your query. Google treats the * as a placeholder for a word or more than one word.
Example 1: [sorghum * genome]
The query in the example return pages starts with sorghum and end with genome. Between these words, the * places words.
Example 2 : [ *mildew* ]
The query in the example returns pages having words preceding and succeeding of mildew.
Example 3 : [ aflatoxin****** ]
The query in the example return pages having upto 6 words after aflatoxin.