Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
dung cong » dung trong
manh toan » thanh toan, anh tuan, tinh toan
hinh cua » chinh cua, tinh cua, dinh cua
sinh cua » manh cua, dinh cuu, sinh va
san toan » van toan, dan toan, xuan toan

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 - hanh ((hinh cua) or (sinh cua)) dung cong ((san toan) or (manh toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - hanh ((hinh cua) OR (sinh cua)) dung cong ((san toan) OR (manh toan)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - hanh ((hinh cua) or (sinh cua)) dung cong ((san toan) or (manh toan)) cao*.