Perhaps you should try some spelling variations:
trong duong » tuong duong, thong duong, trong dong
thieu xanh » chieu xanh, hieu manh, thien danh
duong manh » duong van
thien anh » thien danh, tien anh, thien thanh
chinh cua » chinh ca, chinh sua, chinh luan
manh toan » thanh toan, anh tuan, tinh toan
hinh cua » sinh cua, tinh cua, dinh cua
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 (thien anh)) - hanh ((chinh cua) OR (hinh cua)) trong duong manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien anh)) - hanh ((chinh cua) OR (hinh cua)) trong duong manh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (thien anh)) - hanh ((chinh cua) OR (hinh cua)) trong duong manh toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (thien anh)) - hanh ((chinh cua) OR (hinh cua)) trong duong manh toan ban*.