Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
truong cao » truong dai
cong thanh » dong thanh, cong trinh, truong thanh
ho chieu » theo chieu, hoc thieu, doi chieu
trung ha » trung hoc, trung tam, trung cap
cong tan » cong tac, cong san, cong ty
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 sang - thanh ((trung ha) or (truong cao)) nhung ((cong tan) OR (cong thanh)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - thanh ((trung ha) OR (truong cao)) nhung ((cong tan) OR (cong thanh)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - thanh ((trung ha) or (truong cao)) nhung ((cong tan) OR (cong thanh)) toan cao".
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - thanh ((trung ha) or (truong cao)) nhung ((cong tan) OR (cong thanh)) toan cao*.