Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
trung va » truong va, trung ha, trung tam
trang va » tran van, hang va
cong anh » cong danh, dong anh, hong anh
tuan cao » toan cao, juan cao, quang cao

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chieu sang)) - hanh ((trung va) OR (trang va)) nhung cong anh tuan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (chieu sang)) - hanh ((trung va) OR (trang va)) nhung cong anh tuan cao~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (chieu sang)) - hanh ((trung va) OR (trang va)) nhung cong anh tuan cao*.