Perhaps you should try some spelling variations:
scf description » self description, f description, cbf description
2f description » f description, cbf description, self description
8 description » 7.2 description
2c southern » 24 southern, 21 southern, 20 southern
2 southern » _ southern, a southern, 6 southern

Try widening your search to All Fields.

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: %22vietnam%((2c southern) OR (2 southern)) %((((((2f description) OR (8 description))) OR (7 description))) OR (scf description)) AND travel%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22vietnam%((2c southern) or (2 southern)) %((((((2f description) OR (8 description))) or (7 description))) or (scf description)) and travel%22".
• Adding a wildcard symbol may retrieve word variants: %22vietnam%((2c southern) or (2 southern)) %((((((2f description) OR (8 description))) or (7 description))) or (scf description)) and travel%22*.