Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
trung hoc » trung quoc
dung cong » dung trong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
trang va » tran van, hang va
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 ((chieu sach) OR (chiet tach)) - hanh ((trung hoc) or (trang va)) dung cong manh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chiet tach)) - hanh ((trung hoc) OR (trang va)) dung cong manh toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chiet tach)) - hanh ((trung hoc) or (trang va)) dung cong manh toan tap".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) OR (chiet tach)) - hanh ((trung hoc) or (trang va)) dung cong manh toan tap*.