Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
manh tuong » manh tung, manh cuong, minh tuong
cong thanh » dong thanh, cong trinh, truong thanh
bien tinh » bi tinh, yen tinh, diep tinh
tuong cua » truong cua, huong cua, thong cua
cua nhung » va nhung
cong tan » cong tac, cong san, 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) or (bien tinh)) - manh tuong cua nhung ((cong tan) OR (cong thanh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu tinh) OR (bien tinh)) - manh tuong cua nhung ((cong tan) OR (cong thanh)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu tinh) or (bien tinh)) - manh tuong cua nhung ((cong tan) OR (cong thanh)) toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu tinh) or (bien tinh)) - manh tuong cua nhung ((cong tan) OR (cong thanh)) toan cau*.