Perhaps you should try some spelling variations:
trung cong » truong cong, trong cong, trung uong
chieu sach » chinh sach, chiet tach, chieu sang
tranh cua » doanh cua, manh cua
cua trung » cua truong, xuan trung, cua nhung
kien mac » dien mao, tien mai, kien ha
cong sat » cong suat, cong san, cong hat
sat phan » sat nhan, vat phan, xuat phan
phan lap » phan dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sach) or (kien mac)) - canh tranh cua trung cong sat phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (kien mac)) - canh tranh cua trung cong sat phan lap*.