Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
chung cua » chung cu, dung cua, thong cua
huong cua » dung cua
trong bai » trong ban, thong bai, trong hai
bai toan » bai tap
toan cau » toan cao, toan ban, toan tap

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 - manh ((chung cua) or (huong cua)) dung trong bai toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - manh ((chung cua) OR (huong cua)) dung trong bai toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - manh ((chung cua) or (huong cua)) dung trong bai toan cau*.