Perhaps you should try some spelling variations:
laws relative » das relative, als relative, laws relating
relative air » relative gain, relative age, relating air
dong hoang » hong hong
when laws » when ads
hua when » hua chen, a when, hua wei
air raid » air raids, air land
dong di » dong sin

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong di) or (dong hoang)) ya hua when laws relative air raid ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong di) OR (dong hoang)) ya hua when laws relative air raid ;*.