Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
dung tuong » dung thuong, dung truong, dung trong
hieu manh » chieu xanh, hieu nganh, dieu hanh
manh hung » anh huong
hach toan » thanh toan, manh toan
hung cua » huong cua, chung cua, khung cua
cua dung » cua dang, cua dong, qua dung
tac toan » tap toan, tam toan, tich toan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu manh) or (chieu sang)) - manh hung cua dung tuong ((tac toan) or (hach toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chieu sang)) - manh hung cua dung tuong ((tac toan) OR (hach toan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (chieu sang)) - manh hung cua dung tuong ((tac toan) or (hach toan)) cau*.