Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
nhung cong » dung cong, thong cong, hang cong
hien xanh » hien hanh, hien nhanh, hien khanh
trung cap » truong cao, trung tam
cap nhung » cam nhung, vap nhung, dap nhung
van tan » van tuan, van ban, van thanh
van tai » von tai, van tuan

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 (chieu xanh)) - thanh trung cap nhung cong ((van tan) OR (van tai)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (chieu xanh)) - thanh trung cap nhung cong ((van tan) OR (van tai)) cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (chieu xanh)) - thanh trung cap nhung cong ((van tan) OR (van tai)) cau*".