Perhaps you should try some spelling variations:
nhan phuong » han phuong, nhung phuong, thanh phuong
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
manh tung » manh hung, thanh tung
tung cua » trung cua, tuong cua, dung cua
cua nhan » ca nhan, cua ngan, cua nha
dan toan » van toan, dan than, manh toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sang) or (hieu lang)) - manh tung cua nhan phuong ((dan toan) or (tinh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (hieu lang)) - manh tung cua nhan phuong ((dan toan) OR (tinh toan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (hieu lang)) - manh tung cua nhan phuong ((dan toan) or (tinh toan)) cau*.