Perhaps you should try some spelling variations:
gender 3.3 » gender 3.4, gender 5.3, gender 1.3
model paul » model pauli, model part, model pah
wing qiao » wang qiao, wing ian
huang tao » huang xiao, wang tao, huang wentao
3 gender » 2 gender
3.3 beam » 3.1 beam, 2.3 beam, 3.2 beam
annex 3 » annex 1, annex 2

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((wing qiao) OR (huang tao)) annex 3 gender 3.3 beam ((modes saul) OR (model paul)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wing qiao) or (huang tao)) annex 3 gender 3.3 beam ((modes saul) OR (model paul)) ;~".
• Adding a wildcard symbol may retrieve word variants: ((wing qiao) or (huang tao)) annex 3 gender 3.3 beam ((modes saul) OR (model paul)) ;*.