Perhaps you should try some spelling variations:
nhung huong » nhung phuong, nhung tuong, nhung cong
chieu sang » chieu sach, chieu xanh, hieu lang
khien bang » phien ban, khien dong
luan nhung » luan chung, luan hung, quan nhung
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
van thanh » ban thanh, van tuan
van toan » van tuan, van tan, 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 (khien bang)) - hanh tang luan nhung huong ((van toan) or (van thanh)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (khien bang)) - hanh tang luan nhung huong ((van toan) OR (van thanh)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (khien bang)) - hanh tang luan nhung huong ((van toan) or (van thanh)) cao*.