Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
tran hoang » tran hong, quan hoang, tran quang
vuong danh » vuong anh, phuong danh, truong danh
cuong danh » cuon danh, huong dan, cuong linh
minh tuan » anh tuan
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 chieu sach - ((minh tuan) or (canh tranh)) tran hoang ((vuong danh) OR (cuong danh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - ((minh tuan) OR (canh tranh)) tran hoang ((vuong danh) OR (cuong danh)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - ((minh tuan) or (canh tranh)) tran hoang ((vuong danh) OR (cuong danh)) toan cau".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - ((minh tuan) or (canh tranh)) tran hoang ((vuong danh) OR (cuong danh)) toan cau*.