Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
hanh trung » thanh trung, hanh trang, manh trung
hieu manh » chieu xanh, hieu nganh, hien hanh
tong cong » trong cong, dung cong, dang cong
cong cong » cong dong, trong cong, dung cong
dung hanh » dung thanh, dang hanh, dung danh
hanh ca » hanh cac, hanh cat, hanh cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu manh) or (dieu hanh)) - hanh trung tuan ((tong cong) OR (cong cong)) dung hanh ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu manh) OR (dieu hanh)) - hanh trung tuan ((tong cong) OR (cong cong)) dung hanh ca*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu manh) or (dieu hanh)) - hanh trung tuan ((tong cong) OR (cong cong)) dung hanh ca*".