Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, hieu manh
chieu tinh » trieu tinh, lieu tinh, chau tinh
cong thanh » dong thanh, cong trinh, truong thanh
trung qua » trung quan, trong qua, trung cua
qua trong » quan trong, qua trinh, qua song
cong tan » cong tac, cong san, cong ty
tran cau » tran chau, toan cau, ran 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 ((chieu xanh) or (chieu tinh)) - thanh trung qua trong ((cong tan) OR (cong thanh)) tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu tinh)) - thanh trung qua trong ((cong tan) OR (cong thanh)) tran cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (chieu tinh)) - thanh trung qua trong ((cong tan) OR (cong thanh)) tran cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chieu tinh)) - thanh trung qua trong ((cong tan) OR (cong thanh)) tran cau*.