Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
hanh dinh » thanh dinh, hinh dinh, anh dinh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
dung cong » dung trong
cong san » cong tac
tuan cau » toan cau, tuan cu, thuan cam
quan cau » quang cao, toan cau, quan ha
co dung » co duong, cao dung, co dong

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 tinh - ((hanh dinh) or (hanh tinh)) co dung cong san ((tuan cau) OR (quan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu tinh - ((hanh dinh) OR (hanh tinh)) co dung cong san ((tuan cau) OR (quan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu tinh - ((hanh dinh) or (hanh tinh)) co dung cong san ((tuan cau) OR (quan cau))".
• Adding a wildcard symbol may retrieve word variants: hoc chieu tinh - ((hanh dinh) or (hanh tinh)) co dung cong san ((tuan cau) OR (quan cau))*.