Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
canh trinh » canh tranh, hanh trinh, canh tinh
trinh luan » trinh luat, trinh quan, trinh han
hoc thieu » toc thieu, hoc hien
luan kinh » xuan kinh, luat kinh, luan chinh
hong dan » thong dan, nong dan, hong van
cong dan » cong san, cong tan, cong dong
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 thieu xanh - canh trinh luan kinh ((((hong dan) OR (huong dan))) or (cong dan)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - canh trinh luan kinh ((((hong dan) OR (huong dan))) OR (cong dan)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - canh trinh luan kinh ((((hong dan) OR (huong dan))) or (cong dan)) toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - canh trinh luan kinh ((((hong dan) OR (huong dan))) or (cong dan)) toan tap*.