Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
truong cao » truong dai
thong cong » trong cong, tong cong, thong thong
vang thang » cang thang, van thang, lang thang
trung cap » trung tam
cong vang » cong lang, cong quang, cong ngang
thang cau » hang cau, thong cau, thanh chau

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

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