Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chieu sang, hieu cach
thong cong » trong cong, tong cong, thong thong
hanh han » hanh nhan, hanh phan, hanh san
va thong » va thuong, va phuong, he thong
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban
han va » hang va, hanh va, nhan va

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) or (((chieu sach) or (chiet tach)))) - hanh han va thong cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (((chieu sach) OR (chiet tach)))) - hanh han va thong cong san toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (((chieu sach) or (chiet tach)))) - hanh han va thong cong san toan ban*.