Perhaps you should try some spelling variations:
duong trong » dung trong
chieu xanh » chieu sach, chieu sang, chieu tinh
thanh tinh » thanh binh, nhanh tinh, than kinh
cong trong » cong thuong, cong trinh, dung trong
hieu xanh » hieu manh, hieu nganh, dieu hanh
manh toan » thanh toan, anh tuan, tinh toan
tinh cua » trinh cua, sinh cua, tinh chat
toan cao » toan ban, toan tap

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

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