Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
hanh trong » hanh trang, anh trong, hinh trong
trong quan » thong quan, tong quan, thong quang
quan dung » quang dung, quan duong, qua dung
dung cong » dung trong
hach toan » thanh toan
manh toan » thanh toan, anh tuan, tinh toan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sang)) - hanh trong quan dung cong ((hach toan) OR (manh toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) OR (chieu sang)) - hanh trong quan dung cong ((hach toan) or (manh toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) OR (chieu sang)) - hanh trong quan dung cong ((hach toan) or (manh toan)) cau*.