Perhaps you should try some spelling variations:
thieu xanh » thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu manh » hieu nganh, dieu hanh, hien hanh
tranh cua » doanh cua, manh cua
trong tap » trong thap, tong tap, trong tan
cua dung » cua dang, cua dong, qua dung
tap toan » tap doan, tap quan, bai 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: hoc ((((thieu xanh) OR (chieu xanh))) or (hieu manh)) - hanh tranh cua dung trong tap toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((thieu xanh) OR (chieu xanh))) OR (hieu manh)) - hanh tranh cua dung trong tap toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((((thieu xanh) OR (chieu xanh))) or (hieu manh)) - hanh tranh cua dung trong tap toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((((thieu xanh) OR (chieu xanh))) or (hieu manh)) - hanh tranh cua dung trong tap toan ban*.