Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
cong ngang » cong nhan, cong quang, cong lang
hieu manh » hieu nganh, dieu hanh, hien hanh
trung cap » truong cao, trung tam
cap nhung » cam nhung, vap nhung, dap nhung
cong vang » cong lang, cong quang, cong san
thanh cau » thanh chau, thanh mau, nhanh cau

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

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