OR

Finds records containing at least one of the words (in the case of a FamPat record, at least one of the members will have one or more of your terms)

sulfur or sulphur

AND

All words

plutonium AND isotope

NOT

The first term without the second term

suv NOT vesicle

F

The terms in the same field

sodium f chlorine  

S

The terms in the same sentence

sodium s chlorine

P

The terms in the same paragraph

sodium p chlorine

D

The terms adjacent in any order inside the same sentence

redundancy d check

nD

The terms adjacent, regardless of the order, separated by a maximum of n words inside the same sentence (n value between 1 and 99)

conduct 2d electric 2d adhesive

=nD

The terms adjacent, regardless of the order, separated by exactly n words inside the same sentence (n value between 1 and 99)

electric+ =2d conduct+ =2d adhesive

W

The terms adjacent in the order specified inside the same sentence; treatment applied by default for two terms entered without operator

smart w card?
smart card?

nW

The terms adjacent  in the order specified and separated by a maximum of n words inside the same sentence (n = value between 1 and 99)

friction 9w pad?

=nW

The terms adjacent in the order specified and separated by exactly n words inside the same sentence (n = value between 1 and 99)

friction =9w pad?

_

The underscore allows for simultaneous searching of terms that may be written as one or two words. It will also retrieve results where there is a hyphen between terms, and it can also be used in chemical formulasUp to five _s may be used within a term

air_bag

+ethylen+_+carbonate+       

Parentheses

Parentheses (nesting) are necessary when combining different operators

((wireless w application w protocol) or wap) not (dna or transgenic)
(hair 2d (dye or dyeing)) and oxidate +