Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
chiet tach » chieu sach
tong cong » trong cong, cong cong, dung cong
tinh cua » trinh cua, sinh cua, tinh chat
toan cao » toan ban, toan tap
ty toan » ly toan, tap toan, huy toan
luat » luan, xuat

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 sang) or (chiet tach)) - hanh ((trinh luat) or (tinh cua)) tong cong ty toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (chiet tach)) - hanh ((trinh luat) OR (tinh cua)) tong cong ty toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (chiet tach)) - hanh ((trinh luat) or (tinh cua)) tong cong ty toan cao*.