Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trung cong » truong cong, trong cong, trung uong
dien sach » dien anh
kien sach » vien bach, kien mac, viet sach
trinh cua » tinh cua, trinh luat, trinh quan
cua trung » cua truong, xuan trung, cua nhung
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 ((dien sach) or (kien sach)) - hanh trinh cua trung cong sat phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((dien sach) OR (kien sach)) - hanh trinh cua trung cong sat phan lap*.