Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
tieu sach » dien sach, te sach, viet sach
cua thong » cua thuong, cua khong, cua tong
duong van » duong va, luong va, dang van
tung cua » trung cua, tuong cua, dung cua
toan cau » toan cao, toan ban, toan tap

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 thong ((duong manh) or (duong van)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((tieu sach) OR (chieu sach)) - thanh tung cua thong ((duong manh) OR (duong van)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((tieu sach) OR (chieu sach)) - thanh tung cua thong ((duong manh) or (duong van)) toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((tieu sach) OR (chieu sach)) - thanh tung cua thong ((duong manh) or (duong van)) toan cau*.