Perhaps you should try some spelling variations:
tieu xanh » chieu xanh, dieu hanh, tien anh
tieu danh » dieu danh, tiep danh, thien danh
dung cong » dung trong
trinh ve » trinh he, trinh va, trinh viet
trinh vi » trinh va, trinh viet, trinh van
cong san » cong tac
san phan » san pham, van phan, sat phan
phan cau » phan dau, phan cac, phan tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((tieu xanh) OR (tieu danh)) - canh ((trinh ve) OR (trinh vi)) dung cong san phan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((tieu xanh) or (tieu danh)) - canh ((trinh ve) OR (trinh vi)) dung cong san phan cau~".
• Adding a wildcard symbol may retrieve word variants: theo ((tieu xanh) or (tieu danh)) - canh ((trinh ve) OR (trinh vi)) dung cong san phan cau*.