Perhaps you should try some spelling variations:
nhung phuong » dung phuong, truong phuong, bang phuong
hanh trung » thanh trung, hanh trang, manh trung
chieu sang » chieu sach, chieu xanh, nhieu tang
nhu phuong » thu phuong, thi phuong, thu huong
hieu lang » hieu quang, nhieu tang, hieu van
trung cap » truong cao, trung tam
van van » tan van, san van, van vat

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 ((chieu sang) OR (hieu lang)) - hanh trung cap ((nhung phuong) OR (nhu phuong)) van van ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) or (hieu lang)) - hanh trung cap ((nhung phuong) OR (nhu phuong)) van van ban~".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (hieu lang)) - hanh trung cap ((nhung phuong) OR (nhu phuong)) van van ban*.