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

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

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