Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trung » thanh trung, hanh trang, manh trung
trung cao » truong cao, trung cap, trung co
cong cong » cong dong, trong cong, dung cong
cao cong » cac cong, cao dang, cua cong
cong ban » cong bang, cong san, cong tan
than tap » toan tap, phan tap, than cap
han tap » han tai, toan tap, nhan tai

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 (chinh sach)) - hanh trung cao cong cong ban ((than tap) OR (han tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chinh sach)) - hanh trung cao cong cong ban ((than tap) OR (han tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (chinh sach)) - hanh trung cao cong cong ban ((than tap) OR (han tap))".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chinh sach)) - hanh trung cao cong cong ban ((than tap) OR (han tap))*.