Perhaps you should try some spelling variations:
nghiem quoc » nghiem duoc, nghiem nuoc, nghiep quoc
thoi nghiem » thi nghiem, khoi nghiep, thuc nghiem
phanh thoi » hanh thoi, phan thoi, phan thi
nghiem ban » nghiem van, nghiem xuan, nghiep bang
nghia quoc » nghia cuoc, nghia duoc, nghiep quoc
mach tuan » manh tuan, mach tiang, anh tuan
co phanh » co phan, co thanh, co hanh
ban mach » ban sach, ranh mach, ban hanh
ban hoc » bang hoc, van hoc, bai hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( co phanh thoi nghiem ban hoc ) or ( ban mach tuan ((nghia quoc) or (nghiem quoc)) hoi ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( co phanh thoi nghiem ban hoc ) OR ( ban mach tuan ((nghia quoc) OR (nghiem quoc)) hoi )).
• Adding a wildcard symbol may retrieve word variants: (( co phanh thoi nghiem ban hoc ) or ( ban mach tuan ((nghia quoc) or (nghiem quoc)) hoi ))*.