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
so nhung » bo nhung, so chung, song nhung
cong tac » cong ty
toan cau » toan cao, toan ban, toan tap

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)) so nhung ((cong san) or (cong tac)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu tinh - ((hanh dinh) OR (hanh tinh)) so nhung ((cong san) OR (cong tac)) toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc chieu tinh - ((hanh dinh) or (hanh tinh)) so nhung ((cong san) or (cong tac)) toan cau*.