Perhaps you should try some spelling variations:
chiet tach » chieu sach
duong manh » duong van
manh dung » manh hung, manh tung, anh dung
nhua nang » nhua mang, thuat nang, kha nang
chua nang » chuc nang, chua xang, kha nang
ho chiet » ho chieu, ho thiet, hoc thiet
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - manh dung ((nhua nang) OR (chua nang)) duong manh ((toan cau) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - manh dung ((nhua nang) OR (chua nang)) duong manh ((toan cau) or (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - manh dung ((nhua nang) OR (chua nang)) duong manh ((toan cau) or (toan cao))*.