Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trinh » hanh chinh
nhung dung » phuong dung, ung dung, thong dung
doi chieu » doc hieu, doi chi, ho chieu
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: doi chieu sang - ((hanh trinh) OR (canh tranh)) cua ((nhung dung) or (nhung phuong)) van ban tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - ((hanh trinh) OR (canh tranh)) cua ((nhung dung) OR (nhung phuong)) van ban tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - ((hanh trinh) OR (canh tranh)) cua ((nhung dung) or (nhung phuong)) van ban tap".
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - ((hanh trinh) OR (canh tranh)) cua ((nhung dung) or (nhung phuong)) van ban tap*.