Perhaps you should try some spelling variations:
quang xuan » quang tuan, quang uan, hoang xuan
chieu sang » chieu sach, chieu xanh, hieu lang
cong trong » cong thuong, duong trong, cong trinh
trong luan » truong luan, tong luan, trong quan
hieu manh » chieu xanh, hieu nganh, dieu hanh
xuan cong » xuan cuong, luan cong, xuat cong

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

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