Perhaps you should try some spelling variations:
vice » voice
rice » price, rise, rich
vie » viet, viec, view
vien » vietn, viecn, viewn, viet, bien
vietnam » viettnam, viectnam, viewtnam
viectnam » vietctnam, viecctnam, viewctnam, vienam, vietnams
vietttnam » viettttnam, viectttnam, viewtttnam
resident » residents, president, resilient

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((vice or mice) or rice) or (vie or vien)) resident of ((vietnam or viectnam ) or vietttnam )~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((vice OR mice) OR rice) OR (vie OR vien)) resident of ((vietnam OR viectnam ) OR vietttnam ).
• Adding a wildcard symbol may retrieve word variants: (((vice or mice) or rice) or (vie or vien)) resident of ((vietnam or viectnam ) or vietttnam )*.