Perhaps you should try some spelling variations:
world powers » world power, world papers, world pioneers
powers alias » moders alias, powers asia, powers claims
jackson aid » jackson a, jackson b.d, jackson a.m
how world » how would, new world, how work
jackson d » jackson _, jackson a, jackson b

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: "2008 how world powers alias ((jackson aid) OR (jackson d))*".