Perhaps you should try some spelling variations:
duong luong » duong vuong, duong truong, thuong luong
chieu sach » chinh sach, chiet tach, chieu sang
canh trinh » canh tranh, hanh trinh, canh tinh
dung luong » dung thuong, dung phuong, dung truong
ho chieu » theo chieu, hoc thieu, doi chieu
trinh ve » trinh he, trinh va, trinh vi
tin toan » tinh toan, nin toan, trinh toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - canh trinh ve ((duong luong) OR (dung luong)) tin toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - canh trinh ve ((duong luong) OR (dung luong)) tin toan cau".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - canh trinh ve ((duong luong) OR (dung luong)) tin toan cau*.