Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, kieu tinh
hanh trung » thanh trung, hanh trang, manh trung
nhung cong » dung cong, thong cong, hang cong
chau tinh » cuu tinh, ha tinh, cua tinh
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
dan than » dan chan, ban than, van than

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 (chau tinh)) - hanh trung cua nhung cong ((dan than) or (tinh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu tinh) OR (chau tinh)) - hanh trung cua nhung cong ((dan than) OR (tinh toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu tinh) OR (chau tinh)) - hanh trung cua nhung cong ((dan than) or (tinh toan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu tinh) OR (chau tinh)) - hanh trung cua nhung cong ((dan than) or (tinh toan)) cau*.