Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
chieu sang » chieu sach, chieu xanh, nhieu tang
manh trong » manh truong, anh trong, manh trung
trong tang » trong trang, trong tan, trong dang
tang nhung » sang nhung, thong nhung, trong nhung
nhung cong » dung cong, thong cong, hang cong
hieu lang » nhieu tang, hieu van, biet lang
cong tac » cong ty
tac luan » tac quan, tao luan, tang luan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sang) or (((hieu lang) or (hieu quang)))) - manh trong tang nhung cong tac luan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sang) OR (((hieu lang) OR (hieu quang)))) - manh trong tang nhung cong tac luan van.
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) or (((hieu lang) or (hieu quang)))) - manh trong tang nhung cong tac luan van*.