The search engine is not case sensative. If no product match your criteria
try removing restrictions, example Availability. If only one product matches your search
criteria you will be redirected to that product page.
Keep it simple. The simpler your wording, the easier it will be to find your product.
Spelling. Double-check your spelling before launching your search.
Be specific. Avoid being too general.
Plurals. Avoid using plurals, example search for camera rather than cameras.
Explore the links. Sometimes a search result may not have exactly what you seek, but its links may have related and similar products.