Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien nhanh » hien hanh, thien thanh, tien thanh
thong cong » tong cong, thong thong, phong chong
hien xanh » hien hanh, chieu xanh, hien khanh
trung cua » truong cua, trung tuan, trung cap
dang ran » dang tran, dang van, dang dan
ran cau » van cau, ban cau, can cau

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