Perhaps you should try some spelling variations:
phuong toan » phuong tran, phuong doan, phuong loan
phong toan » phong thanh, phong trao, phong van
thi chieu » thi chien, thi hieu, theo chieu
tranh cua » doanh cua, manh cua
theo chu » theo chieu, cho chu, chao chu
cua tong » cua cong, cua dong, cua nong

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thi chieu) or (theo chu)) xanh - canh tranh cua tong ((phuong toan) OR (phong toan)) thanh san~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thi chieu) OR (theo chu)) xanh - canh tranh cua tong ((phuong toan) OR (phong toan)) thanh san.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thi chieu) or (theo chu)) xanh - canh tranh cua tong ((phuong toan) OR (phong toan)) thanh san".
• Adding a wildcard symbol may retrieve word variants: ((thi chieu) or (theo chu)) xanh - canh tranh cua tong ((phuong toan) OR (phong toan)) thanh san*.