Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trang » thanh trung, canh tranh, hanh trinh
trang tuan » tran tuan, trung tuan, trong tuan
hoc chieu » hoc thieu, ho chieu, hoc hien
dung cong » dung trong
toan cau » toan cao, toan ban, toan tai
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: hoc chieu sach - hanh trang tuan ((dang cong) or (dung cong)) manh ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - hanh trang tuan ((dang cong) OR (dung cong)) manh ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh trang tuan ((dang cong) or (dung cong)) manh ((toan cau) or (toan tap))*.