Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu lang » chieu sang, hieu quang, nhieu tang
manh tung » manh hung, thanh tung
cua thong » cua thuong, cua khong, cua tong
tung cua » trung cua, tuong cua, dung cua
cong san » cong tac
khan cap » khan ap, than cap, khoan cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (hieu lang)) - manh tung cua thong ((cong san) or (cong ty)) khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (hieu lang)) - manh tung cua thong ((cong san) OR (cong ty)) khan cap.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (hieu lang)) - manh tung cua thong ((cong san) or (cong ty)) khan cap*.