Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
trung tuan » trung thanh, trung tam, tran tuan
hien xanh » hien hanh, chieu xanh, hien khanh
trung cua » truong cua, trung cap, dung cua
dung cong » dung trong
cong anh » cong danh, dong anh, hong anh
tuan cau » toan cau, quan cau, tuan cu

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