Perhaps you should try some spelling variations:
nhung tuong » nhung huong, nhung phuong, hung vuong
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
hanh manh » hanh mang, lanh manh, hoang manh
cua nhung » va nhung
manh cua » doanh cua, ban cua
doan van » doan va, hoang van, tran van
luan » quan, lan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((hieu lang) or (chieu sang)) - hanh manh cua nhung tuong ((doan van) OR (luan van)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu lang) OR (chieu sang)) - hanh manh cua nhung tuong ((doan van) OR (luan van)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((hieu lang) or (chieu sang)) - hanh manh cua nhung tuong ((doan van) OR (luan van)) ban".
• Adding a wildcard symbol may retrieve word variants: doi ((hieu lang) or (chieu sang)) - hanh manh cua nhung tuong ((doan van) OR (luan van)) ban*.