Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
van tham » van thanh, van tuan, van chat
va triet » va thiet, va trien, ve triet
tham xuc » tham nuoc, tham thuc, pham duc
hieu van » hieu va, thien van, lieu va
tu nano » truc nano
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
nano 1 » nano o
xuc va » duc va, tuc va, luc va
1 h » 1 ha, 12 h

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((cuu dac) or (su sach)) tu nano 1 h. hieu van tham xuc va hanh vi ((va triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((cuu dac) OR (su sach)) tu nano 1 h. hieu van tham xuc va hanh vi ((va triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: ((cuu dac) or (su sach)) tu nano 1 h. hieu van tham xuc va hanh vi ((va triet) or (cua viet))*.