Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trung » thanh trung, hanh trang, manh trung
thong phan » thong quan, thong van, trong phat
chong phap » phuong phap
trung tao » trung tam, trong tao, trung tai
tao thong » tao trong, giao thong, toan thong
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 (trieu tinh)) - hanh trung tao thong ((thong phan) OR (chong phap)) tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (trieu tinh)) - hanh trung tao thong ((thong phan) OR (chong phap)) tran cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (trieu tinh)) - hanh trung tao thong ((thong phan) OR (chong phap)) tran cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (trieu tinh)) - hanh trung tao thong ((thong phan) OR (chong phap)) tran cau*.