Perhaps you should try some spelling variations:
duong thanh » muong thanh, luong thanh, dung thanh
chieu xanh » chieu sach, chieu sang, chieu tinh
dong thanh » truong thanh
trung hoc » trung quoc
ho chieu » theo chieu, hoc thieu, doi chieu
trung ha » trung tam, trung cap
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu xanh - thanh ((trung ha) OR (trung hoc)) nhung ((duong thanh) or (dong thanh)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - thanh ((trung ha) OR (trung hoc)) nhung ((duong thanh) OR (dong thanh)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - thanh ((trung ha) OR (trung hoc)) nhung ((duong thanh) or (dong thanh)) toan cao".
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - thanh ((trung ha) OR (trung hoc)) nhung ((duong thanh) or (dong thanh)) toan cao*.