Perhaps you should try some spelling variations:
thanh trung » thanh tung
cong khanh » cong thanh, cong khan, cong nhan
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
cong hach » cong sach, cong thanh, trong hach
toan ban » van ban

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 nhung ((cong hach) or (cong khanh)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien hanh)) - thanh trung cua nhung ((cong hach) OR (cong khanh)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) OR (hien hanh)) - thanh trung cua nhung ((cong hach) or (cong khanh)) toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) OR (hien hanh)) - thanh trung cua nhung ((cong hach) or (cong khanh)) toan ban*.