Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
thieu sang » chieu sang, thieu khang, thieu quang
nhung dung » phuong dung, ung dung, thong dung
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
tinh cua » trinh cua, sinh cua, tinh chat
ban tap » bai tap, han tap, ban tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu sang - hanh tinh cua ((nhung dung) or (nhung phuong)) van ban tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sang - hanh tinh cua ((nhung dung) OR (nhung phuong)) van ban tap*.