Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chau tinh » cuu tinh, cua tinh, cac tinh
hanh cong » thanh cong, hang cong, hanh dong
cua nhung » va nhung
cong cua » cong cu, dong cua, huong cua
tan toan » tan tran, van toan, dan toan
tap toan » tap doan, tap quan, bai toan
ha tinh » va tinh, may tinh

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

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