Perhaps you should try some spelling variations:
nghiem thuoc » nghiem duoc, nghiem hoa, nghi thuc
khanhh thi » nhanh thi, khanh thu
thi nghiem » thuc nghiem
khanh trai » khanh tra, khach trai, khanh trach
vu khanhh » vu thanh, vu khach, vu hanh
thuoc hoc » thuoc ho, thuoc nhom, thuong hoc
trai nghe » thai nghe, trai nghiem, trai nghia
vu khanh » vu thanh, van khanh, duy khanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( vu khanhh thi nghiem thuoc hoc ) or ( vu khanh trai nghe ((duoc hoc) or (quoc hoi)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( vu khanhh thi nghiem thuoc hoc ) OR ( vu khanh trai nghe ((duoc hoc) OR (quoc hoi)) )).
• Adding a wildcard symbol may retrieve word variants: (( vu khanhh thi nghiem thuoc hoc ) or ( vu khanh trai nghe ((duoc hoc) or (quoc hoi)) ))*.