Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
canh trinh » canh tranh, hanh trinh, canh tinh
luan kinh » luat kinh, luan chinh, qua kinh
xuan kinh » xuan dinh, qua kinh, than kinh
duong dan » duong dang, huong dan, duong van
dan toan » van toan, dan than, manh toan
toan tap » toan 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 ((chieu xanh) OR (chieu sach)) - canh trinh ((luan kinh) or (xuan kinh)) duong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sach)) - canh trinh ((luan kinh) OR (xuan kinh)) duong dan toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) OR (chieu sach)) - canh trinh ((luan kinh) or (xuan kinh)) duong dan toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) OR (chieu sach)) - canh trinh ((luan kinh) or (xuan kinh)) duong dan toan tap*.