Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
hanh truong » hanh trong, anh truong, manh truong
chieu xanh » chieu sach, chieu sang, chieu tinh
truong cua » truong ca, truong quan, truong cao
cua thuong » cua truong, cua phuong, ca thuong
ho chieu » theo chieu, hoc thieu, doi chieu
tan toan » tan tran, tap toan, van toan
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: ho chieu xanh - hanh truong cua thuong cong ((tan toan) or (bai toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - hanh truong cua thuong cong ((tan toan) OR (bai toan)) cao.
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - hanh truong cua thuong cong ((tan toan) or (bai toan)) cao*.