Perhaps you should try some spelling variations:
dam planning » term planning, from planning, land planning
planning can » planning chain, planning case, planning land
china tong » china hong, china long, china strong
tong song » hong song, song seng, tong king
song amin » song min, song shin, song jin
amin hong » min hong, among hong, tin 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: dam planning can china tong song amin hong (tan OR than) ;~.
• Adding a wildcard symbol may retrieve word variants: dam planning can china tong song amin hong (tan or than) ;*.