Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, thi chieu
tranh cua » doanh cua, manh cua
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, thi chieu
cua dung » cua dang, cua dong, qua dung
cong hai » cong thai, cong ha, hoang hai
hai toan » bai toan, hai tan, hach toan
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: ((((ho chieu) or (mot chieu))) or (doi chieu)) sach - canh tranh cua dung cong hai toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((ho chieu) OR (mot chieu))) OR (doi chieu)) sach - canh tranh cua dung cong hai toan cau.
• Adding a wildcard symbol may retrieve word variants: ((((ho chieu) or (mot chieu))) or (doi chieu)) sach - canh tranh cua dung cong hai toan cau*.