Perhaps you should try some spelling variations:
thanh trung » thanh tung
phuong cham » phuong phap, phuong thao
theo chieu » theo tieu, ho chieu, theo chu
phuong cau » huong cau, phuong cach, thuong chau
doi chieu » doc hieu, doi chi, ho chieu
dung dong » dung cong, vung dong, dung trong
dong bang » dong san
trung su » trung vu, trong su, trung du

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) or (doi chieu)) xanh - thanh trung su dung dong bang ((phuong cau) or (phuong cham))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (doi chieu)) xanh - thanh trung su dung dong bang ((phuong cau) OR (phuong cham)).
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (doi chieu)) xanh - thanh trung su dung dong bang ((phuong cau) or (phuong cham))*.