Perhaps you should try some spelling variations:
reformen jan » reformen a, reformen nach, reformen der
reformen von » formen von, reform von, referaten von
dang haji » dang hai, dato haji
when you » when do
you mean » you can, you eat, you lead
mean why » means why, mean what, learn why
hong ng » hong kong, hong jong, hong hong

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: when you mean why ((reformen jan) OR (reformen von)) david ((hong ng) OR (dang haji)) ;~.
• Adding a wildcard symbol may retrieve word variants: when you mean why ((reformen jan) or (reformen von)) david ((hong ng) or (dang haji)) ;*.