Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
tieu sach » dien sach, te sach, viet sach
cua nhung » va nhung
cong manh » cong danh, duong manh, cong thanh
tung cua » trung cua, tuong cua, dung cua
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: theo ((tieu sach) or (chieu sach)) - thanh tung cua nhung cong manh ((toan cao) OR (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((tieu sach) OR (chieu sach)) - thanh tung cua nhung cong manh ((toan cao) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((tieu sach) or (chieu sach)) - thanh tung cua nhung cong manh ((toan cao) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: theo ((tieu sach) or (chieu sach)) - thanh tung cua nhung cong manh ((toan cao) OR (toan tap))*.