Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh
nhieu tang » nhiet nang
hanh trung » thanh trung, hanh trang, manh trung
nhung cong » dung cong, thong cong, hang cong
hieu lang » hieu quang, hieu van, biet lang
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap

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: ho ((chieu sang) OR (((nhieu tang) OR (hieu lang)))) - hanh trung cua nhung cong tac toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (((nhieu tang) OR (hieu lang)))) - hanh trung cua nhung cong tac toan cao~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (((nhieu tang) OR (hieu lang)))) - hanh trung cua nhung cong tac toan cao*.