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