"directions for using" is a correct and usable phrase in written English.
You can use it when you are providing instructions for how to do something. For example, "Make sure to read the directions for using the product before you begin."
Pretty soon we will be able to buy a bottle of holiday sherry with directions for using.
Follow the manufactures directions for using the muriatic acid, wear protective gloves and goggles and work with adequate ventilation.
Here is a link from The Kitchn that gives great directions for using the pulp.
A zīj is a handbook of astronomical tables, including tables for working out positions of the Sun, Moon, and planets, accompanied by directions for using them.
As an aid to convenient calculation, Ptolemy also composed the Procheiroi kanones (Handy Tables), in which the astronomical tables of the Almagest were expanded and accompanied by directions for using them but were stripped of the theoretical discussion.
They also outlined game theory applications in other layers and future directions for using game theory in CR.
Nanotechnology offers new and potential direction for using interface between biological (as well as photosynthetic) structures and non-biological nanostructures with enhanced functions for harvesting solar energy or functioning as sensitive photonic chemical sensors [63].
These directions are for using Microsoft Word, the most commonly used word processing program in the United States and Europe.
"Labeling of OIM products like compost provides consumers with useful information previously not required by manufacturers including product contents, directions for use and information on use for Certified Organic operations," says Professor Stephen Andrews, soil scientist at UC Berkeley, California.
The cards usually come with PIN numbers and directions for use on the back.
Peter B. Hutt, a lawyer representing USPlabs, a Dallas-based company that markets Jack3d and other supplements, says the company is "unaware of anyone that died who has used the product in accordance with the labels' directions for use".
