Tell us more about what phrases you are searching and the exact context. You'll get different sets of results with "bugger mump marmot tires" and bugger "mump marmot" tires (grouping with quotes), bugger mump +marmot tires (requires 'marmot'), and bugger mump marmot tires (no grouping, no order, returns each post with ANY of these words).

Also, some subjects like tires have been hashed so many times that it is really hard to get good search results even with well-chosen search criteria. Tell us more about what you'd like to find out and maybe someone can suggest better search criteria for you or provide direct links from their own searches...
Anywho

FWIW, on your original question, your 93 Rodeo is pretty flexible for backspacing... that's a small variance you mention, so if the wheels are the right price, IMHO, that's close enough for size. Buy 'em!

Randii