Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu sach » chinh sach, chiet tach, chieu sang
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong san » cong tac
toan ban » van ban
tan ban » tang ban, van ban, can ban

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 (hieu lang)) - canh tranh cua nhung cong san ((tan ban) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (hieu lang)) - canh tranh cua nhung cong san ((tan ban) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sach) or (hieu lang)) - canh tranh cua nhung cong san ((tan ban) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (hieu lang)) - canh tranh cua nhung cong san ((tan ban) OR (toan ban))*.