Perhaps you should try some spelling variations:
lanh tranh » canh tranh, lan tranh, hanh trinh
thong cong » trong cong, tong cong, thong thong
doi chieu » doc hieu, doi chi, mot chieu
lanh manh » lan anh, van manh, anh anh
cua thong » cua thuong, cua khong, cua tong
ho chieu » theo chieu, hoc thieu, mot chieu
cong hai » cong thai, cong ha, hoang hai
hai toan » bai toan, hai tan, hach toan
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: ((doi chieu) or (ho chieu)) sach - ((lanh manh) OR (lanh tranh)) cua thong cong hai toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (ho chieu)) sach - ((lanh manh) OR (lanh tranh)) cua thong cong hai toan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (ho chieu)) sach - ((lanh manh) OR (lanh tranh)) cua thong cong hai toan cao*".