Perhaps you should try some spelling variations:
hanh thang » nhanh thang, thanh thang, hanh trang
thong cong » trong cong, tong cong, thong thong
tieu xanh » tieu danh, chieu xanh, dieu hanh
thang va » hang va, trang va, thong va
va thong » va thuong, va phuong, he thong
dan toan » van toan, dan than, manh toan
tap toan » tap doan, tap quan
bai toan » bai tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu xanh - hanh thang va thong cong ((dan toan) or (((tap toan) OR (bai toan)))) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - hanh thang va thong cong ((dan toan) OR (((tap toan) OR (bai toan)))) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - hanh thang va thong cong ((dan toan) or (((tap toan) OR (bai toan)))) cau".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh thang va thong cong ((dan toan) or (((tap toan) OR (bai toan)))) cau*.