Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thien van » thi van
thu nano » truc nano, thu ban, thu hang
va triet » va thiet, va trien, ve triet
tu nano » truc nano
dau xuc » dau xua, dau nuoc
dau xac » dau xay, dan xac
va dinh » van dinh, va kinh, va tinh
dinh tu » danh tu, dinh cu, tinh tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ((thu nano) OR (tu nano)) xa hoi. thien van ((dau xuc) or (dau xac)) va dinh tu va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ((thu nano) OR (tu nano)) xa hoi. thien van ((dau xuc) OR (dau xac)) va dinh tu va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ((thu nano) OR (tu nano)) xa hoi. thien van ((dau xuc) or (dau xac)) va dinh tu va triet".
• Adding a wildcard symbol may retrieve word variants: thuat sach ((thu nano) OR (tu nano)) xa hoi. thien van ((dau xuc) or (dau xac)) va dinh tu va triet*.