Perhaps you should try some spelling variations:
nghiem quoc » nghiem duoc, nghiem nuoc, nghiep quoc
thoi nghiem » thi nghiem, khoi nghiep, thuc nghiem
nghiem ban » nghiem van, nghiem xuan, nghiep bang
nghia quoc » nghia cuoc, nghia duoc, nghiep quoc
hanh thoi » hanh thuoc, nhanh thai, hanh noi
mach tuan » manh tuan, mach tiang, anh tuan
ban mach » ban sach, ranh mach, ban hanh
co hanh » co thanh, co phanh, co anh
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 hanh 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 hanh thoi nghiem ban hoc ) OR ( ban mach tuan ((nghia quoc) OR (nghiem quoc)) hoi )).
• Adding a wildcard symbol may retrieve word variants: (( co hanh thoi nghiem ban hoc ) or ( ban mach tuan ((nghia quoc) or (nghiem quoc)) hoi ))*.