Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
canh trinh » canh tranh, canh tinh, anh trinh
hanh trinh » canh tranh, hanh chinh
vuong tin » vuong tan, duong tien, thuong tin
luong tin » thong tin, luong tai, luong thi
ho chieu » theo chieu, hoc thieu, doi chieu
toan cau » toan cao, toan ban, toan tap
va hung » va nhung, van hung, va huong

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - ((canh trinh) or (hanh trinh)) va hung ((vuong tin) OR (luong tin)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - ((canh trinh) OR (hanh trinh)) va hung ((vuong tin) OR (luong tin)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - ((canh trinh) or (hanh trinh)) va hung ((vuong tin) OR (luong tin)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - ((canh trinh) or (hanh trinh)) va hung ((vuong tin) OR (luong tin)) toan cau*.