Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
hanh va » hang va, hanh vi
hanh ve » hanh vi, hanh kem
xuc van » duc van, luc van, vuc van
hieu va » lieu va, hieu qua
tu nang » tru nang, tu nong, tu lang
tu nano » truc nano
su tien » su kien, su hien, tu tieng
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, x ho

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: tu sach ((tu nang) OR (tu nano)) x hoi. hieu va cam xuc van ((hanh ve) OR (hanh va)) su tien~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((tu nang) OR (tu nano)) x hoi. hieu va cam xuc van ((hanh ve) or (hanh va)) su tien~".
• Adding a wildcard symbol may retrieve word variants: tu sach ((tu nang) OR (tu nano)) x hoi. hieu va cam xuc van ((hanh ve) or (hanh va)) su tien*.