search in datagridview

hello
my program i abot searching in a database viewed by datagridview
and i want to search within two columns
i'm using this code to do so:

Code:

---

InstructorsBindingSource.Filter = "PhoneNumber = '" & Trim(ToolStripTextBox1.Text) & "' and instructors = '" & Trim(ToolStripTextBox2.Text) & "'"

---

but its not working
so any suggested ideas

im not sure whether you can write like
a=b=c format

Define "not working". Remember that we haven't seen your project in action and we don't know what's in your head, so you need to provide a FULL and CLEAR explanation. EXACTLY what are you doing, EXACTLY what do you expect to happen and EXACTLY what does happen?

when starting to search the whole statement is highlighted
what i need is a code for a search box which search within two columns in database
more:if there is in database name john then when i enter letter o then john appears in datagridview as one of the suggestions
and at the same time if there is a phone number of 637267382 in database then if i enter 7
then this number will appear as one of the suggestion in datagridview
i got a code that only shows suggestions that is only contains what is common betwwen the names and phone number

i solve it using this code

vb Code:

InstructorsBindingSource.Filter = "PhoneNumber like '%" & Trim(ToolStripTextBox1.Text) & "%' or instructor like '%" & Trim(ToolStripTextBox1.Text) & "%'"