Proximity - Same order
Use pre/X
e.g. parent* pre/2 educational
This would bring up an article with no more than two words between parent* and educational (in this order) e.g. "Parent practices and educational achievement" OR "Parents on Educational Attainment" OR "Parental Values, Educational Attainment" etc.
Proximity - Any order
Use w/X
e.g. parent* w/3 educational
This would bring up an article with no more than three words between parent* and educational (in any order) e.g. "Educational practices of parents" OR "Parents value motivation and education" OR "Educational attainments of Latino parents"
Wildcard
Use ?
e.g. freshm?m to search for freshman and freshmen