Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
va triet » va thiet, va trien, ve triet
te sach » toc sach
van lam » van nam
lam xuc » cam xuc, lam duoc
va kinh » va tinh, qua kinh
kinh tu » kinh te, tinh tu, dinh tu
xuc va » duc va, tuc va, luc va
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((tu nano) or (truc nano)) o hoi. hieu van lam xuc va kinh tu va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((tu nano) OR (truc nano)) o hoi. hieu van lam xuc va kinh tu va triet.
• Adding a wildcard symbol may retrieve word variants: te sach ((tu nano) or (truc nano)) o hoi. hieu van lam xuc va kinh tu va triet*.