Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thuong dan » thuong han, thuong dam, thuong lan
hoc thieu » toc thieu, hoc hien
canh manh » canh tranh, cach mang, van manh
lanh manh » lanh tranh, lan anh, van manh
toan cau » toan cao, toan ban, toan tap
va nang » van nang, da nang, cam nang

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 manh) or (lanh manh)) va nang ((thuong dan) OR (huong dan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((canh manh) OR (lanh manh)) va nang ((thuong dan) OR (huong dan)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - ((canh manh) or (lanh manh)) va nang ((thuong dan) OR (huong dan)) toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((canh manh) or (lanh manh)) va nang ((thuong dan) OR (huong dan)) toan cau*.