Perhaps you should try some spelling variations:
nhanh luong » nhanh chuong, nang luong, nhanh chong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, nhung don
hang cong » dang cong, hang nong, bang cong
van tuan » van quan, van ban, anh tuan
tuan cau » toan cau, quan cau, tuan cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - ((nhanh luong) or (nhanh quang)) cua ((nhung cong) OR (hang cong)) van tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - ((nhanh luong) OR (nhanh quang)) cua ((nhung cong) OR (hang cong)) van tuan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - ((nhanh luong) or (nhanh quang)) cua ((nhung cong) OR (hang cong)) van tuan cau".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - ((nhanh luong) or (nhanh quang)) cua ((nhung cong) OR (hang cong)) van tuan cau*.