Now, turn to Genesis 43:8 in a printed edition of the BHS (page 71). Let's look at a rather famous example:
וַיֹּ֨אמֶר יְהוּדָ֜ה אֶל־יִשְׂרָאֵ֣ל אָבִ֗יו שִׁלְחָ֥ה הַנַּ֛עַר אִתִּ֖י וְנָק֣וּמָה וְנֵלֵ֑כָה וְנִֽחְיֶה֙ וְלֹ֣א נָמ֔וּת גַּם־אֲנַ֥חְנוּ גַם־אַתָּ֖ה גַּם־טַפֵּֽנוּ׃
Take a look at the Masora Parva note for Genesis 43:8 : י̇ב̇ פסוק̇ גם גם גם
י̇ב̇ = 12
גם גם גם = a construction/string גם
The meaning = There are 12 verses in the Tanach where גם occurs three times.
The Mm register for Genesis 43:8 only has Mm index numbers for the following words:
שִׁלְחָה= Mm index number 2915
וְנָקוּמָה = Mm Index number 3078
In other words neither the BHS nor it's companion volume Weil's Masorah Gedolah can help you in finding the list or references for the 12 occurrences of the גם גם גם construction.
Also, in this case a paper concordance will be of little help since
גם appears something like 769 times in the Tanach/Hebrew Bible.
Click Searching on גם will similarly not help you much.
(However, Accordance's construction search can find examples of the structure and depending on how many intervening word you selected between each of the גם your results will vary).
However, Since we have the Masorah Thesaurus we can easily find everything the Masora Parva note of the BHS was alluding to:
Open the Masorah Thesaurus
Open the Table contents
Type in גם and search
We will find the information we wanted to know at:
Paragraph 43839 of 188291
Paragraph 43844 of 188291
Paragraph 43850 of 188291
Here, is a screen shot of what the Masorah Thesaurus provides
As, you can see there simply isn't enough space in the printed/paper BHS to provide that type of detailed information for every Masora parva note. This one reason (there are many more) why the Masorah Thesaurus is indispensable for Masoretic studies.