Jamieson-Fausset-Brown Bible Commentary
Gen. 44:5. Is not this it in which my lord drinketh—not only kept for the governor's personal use, but whereby he divines. Divination by cups, to ascertain the course of futurity, was one of the prevalent superstitions of ancient Egypt, as it is of Eastern countries still. It is not likely that Joseph, a pious believer in the true God, would have addicted himself to this superstitious practice. But he might have availed himself of that popular notion to carry out the successful execution of his stratagem for the last decisive trial of his brethren."
There are a few instances with Strong's Numbers where he lumps together 'alternate spellings', but they should actually have their own Strong's #.
H3808 - la/lua - not. Occurs 5,188 times. Of those, 188 are instances of "lua". And "?~lua" occurs 147 times.
It appears that "lua" signals subterfuge (as in, 'deceit used in order to achieve one's goals').
Some are easy to see and others harder (for me).
Gen. 31:35 - Where Rachel lies about not being able to rise when Laban wants to search her donkey for his missing idols.
Gen. 34:23 - Shechem convinces men of his tribe to submit to circumcision by promises - just because he wants Dinah for a wife.
Scripture4all.org is an incredible aid, to me. While ISA 3 beta is not finished (so not fully functional), you can still get the ISA 2's full free program (found under the download area for ISA 3). The Concordant View bar makes it easy to look at the instances of "lua" using the Strong's H3808.