Perhaps you should try some spelling variations:
thanh trung » thanh tung
phuong cham » phuong phap, phuong thao
phuong cau » huong cau, phuong cach, thuong chau
doi chieu » doc hieu, doi chi, mot chieu
dung cong » dung trong
cong bang » cuong bang, dong bang, hong bang
ho chieu » theo chieu, hoc thieu, mot chieu
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: ((ho chieu) or (doi chieu)) xanh - thanh trung su dung cong bang ((phuong cau) or (phuong cham))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) xanh - thanh trung su dung cong bang ((phuong cau) OR (phuong cham)).
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) xanh - thanh trung su dung cong bang ((phuong cau) or (phuong cham))*.