Perhaps you should try some spelling variations:
trinh luan » trinh luat, trinh quan, trinh han
tranh luat » trinh luat, tranh luan, tranh cua
huong dong » phuong dong, chuong dong, thuong dong
doi chieu » doc hieu, ho chieu, mot chieu
dong tinh » dong kinh, dong tin, cong tinh
toan cao » toan ban, toan tap
doi chi » doi khi

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doi chi)) xanh - canh ((tranh luat) OR (trinh luan)) huong dong tinh toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (doi chi)) xanh - canh ((tranh luat) OR (trinh luan)) huong dong tinh toan cao~".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (doi chi)) xanh - canh ((tranh luat) OR (trinh luan)) huong dong tinh toan cao*.