Perhaps you should try some spelling variations:
phuong cham » phuong phap, phuong thao
thanh trung » thanh tung
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
cong bang » cuong bang, dong bang, hong bang
huong cau » thuong chau, huong dan, huong cua
hoc hieu » hoc thieu, hoc hien, doc hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - thanh trung cua nhung cong bang ((phuong cham) or (huong cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - thanh trung cua nhung cong bang ((phuong cham) OR (huong cau)).
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - thanh trung cua nhung cong bang ((phuong cham) or (huong cau))*.