Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chau tinh » cuu tinh, ha tinh, cua tinh
tranh cua » doanh cua, manh cua
dung cong » dung trong
cong manh » cong danh, duong manh, cong thanh
cua dung » cua dang, cua dong, qua dung
toan cao » toan ban
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chau tinh) or (chieu sach)) - canh tranh cua dung cong manh ((toan cao) OR (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chau tinh) OR (chieu sach)) - canh tranh cua dung cong manh ((toan cao) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chau tinh) or (chieu sach)) - canh tranh cua dung cong manh ((toan cao) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: ho ((chau tinh) or (chieu sach)) - canh tranh cua dung cong manh ((toan cao) OR (toan tap))*.