Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, chau tinh, kieu tinh
nhung cong » dung cong, thong cong, hang cong
lieu tinh » trieu tinh, diep tinh, bien tinh
hanh dung » thanh dung, anh dung, hanh dong
cua nhung » va nhung
dung cua » dung luan, dung cho
van than » van thanh, van thang, van tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu tinh) OR (lieu tinh)) - hanh dung cua nhung cong ((xuan toan) or (van than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu tinh) OR (lieu tinh)) - hanh dung cua nhung cong ((xuan toan) OR (van than)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu tinh) OR (lieu tinh)) - hanh dung cua nhung cong ((xuan toan) or (van than)) cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu tinh) OR (lieu tinh)) - hanh dung cua nhung cong ((xuan toan) or (van than)) cau*.