Perhaps you should try some spelling variations:
chieu sach » chiet tach, chieu sang, chieu xanh
luan nhung » luan chung, luan hung, quan nhung
nhung cong » dung cong, thong cong, hang cong
dong luan » dung luan, tong luan, dong xuan
hach toan » thanh toan
manh toan » thanh toan, anh tuan, tinh toan
ha dong » hoat dong, van dong

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 sach) or (chinh sach)) - ha dong luan nhung cong ((hach toan) OR (manh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chinh sach)) - ha dong luan nhung cong ((hach toan) OR (manh toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (chinh sach)) - ha dong luan nhung cong ((hach toan) OR (manh toan)) cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chinh sach)) - ha dong luan nhung cong ((hach toan) OR (manh toan)) cau*.