Perhaps you should try some spelling variations:
"advanced tests in physics" » "advanced test in physics", "advanced text in physics", "advanced teams in physics"
"advanced tasks in physics" » "advanced tools in physics", "advanced tips in physics", "advanced table in physics"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"advanced tests in physics\") OR (\"advanced tasks in physics\"))".
• Removing quotes may allow a broader search: (( advanced tests in physics ) OR ( advanced tasks in physics )).
• Adding a wildcard symbol may retrieve word variants: (("advanced tests in physics") OR ("advanced tasks in physics"))*.