Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
nhung cong » thong cong, hang cong, nhung don
hieu manh » chieu xanh, hieu nganh, dieu hanh
dung cong » dung trong
anh dung » anh dong, anh huong, sach dung
dung cua » dung luan, dung cho
dan toan » van toan, dan than, manh toan
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: theo ((hieu manh) or (chieu sang)) - anh dung cua ((nhung cong) OR (dung cong)) dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu manh) OR (chieu sang)) - anh dung cua ((nhung cong) OR (dung cong)) dan toan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu manh) or (chieu sang)) - anh dung cua ((nhung cong) OR (dung cong)) dan toan cao*".