Perhaps you should try some spelling variations:
thanh chung » thanh chuong, thanh hung, thanh phuong
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
cua tong » cua cong, cua nong, cua song
cua dong » chua dong, cua cong, cua dang
cong tac » cong ty
tac tuan » tac quan, ta tuan, tai tuan
tuan cau » toan cau, quan cau, tuan cu

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 sach)) - thanh chung ((cua tong) or (cua dong)) cong tac tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sach)) - thanh chung ((cua tong) OR (cua dong)) cong tac tuan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) OR (chieu sach)) - thanh chung ((cua tong) or (cua dong)) cong tac tuan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) OR (chieu sach)) - thanh chung ((cua tong) or (cua dong)) cong tac tuan cau*.