Perhaps you should try some spelling variations:
duong trong » dung trong
chieu sang » chieu sach, hieu lang, nhieu tang
chieu xanh » chieu sach, chieu tinh, hieu manh
hanh trung » thanh trung, hanh trang, manh trung
duong cong » dung cong, luong cong, trong cong
trung cua » truong cua, trung tuan, trung cap
tac toan » tap toan, tam toan, hach toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: nhat ((chieu sang) or (chieu xanh)) - hanh trung cua ((duong cong) OR (duong trong)) tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nhat ((chieu sang) OR (chieu xanh)) - hanh trung cua ((duong cong) OR (duong trong)) tac toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nhat ((chieu sang) or (chieu xanh)) - hanh trung cua ((duong cong) OR (duong trong)) tac toan ban".
• Adding a wildcard symbol may retrieve word variants: nhat ((chieu sang) or (chieu xanh)) - hanh trung cua ((duong cong) OR (duong trong)) tac toan ban*.