Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
trang cua » tang cua, trung cua, thang cua
tranh cua » doanh cua, manh cua
trong bai » trong ban, thong bai, trong hai
ho chieu » theo chieu, hoc thieu, doi chieu
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: ho chieu xanh - hanh ((trang cua) or (tranh cua)) dung trong bai toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - hanh ((trang cua) OR (tranh cua)) dung trong bai toan cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - hanh ((trang cua) or (tranh cua)) dung trong bai toan cau*.