Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
trung cua » truong cua, trung tuan, trung cap
cong doan » cong dan, dong doanh, cong san
cong hoan » cong hoa, dong hoa, cong san
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien xanh) or (hien hanh)) - thanh trung cua cong ((cong doan) OR (cong hoan)) phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien hanh)) - thanh trung cua cong ((cong doan) OR (cong hoan)) phan dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (hien hanh)) - thanh trung cua cong ((cong doan) OR (cong hoan)) phan dau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (hien hanh)) - thanh trung cua cong ((cong doan) OR (cong hoan)) phan dau*.