Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
suc van » su van, duc van, luc van
hanh de » hanh ve
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
cao suc » cao su, cao duc
ve cao » va cao, ve bao, ve cac
cua te » cua tu
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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: thuat sach ky nang ((x hoi) OR (o hoi)). hieu ve cao suc van ((hanh de) OR (hanh kem)) cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky nang ((x hoi) or (o hoi)). hieu ve cao suc van ((hanh de) OR (hanh kem)) cua te~".
• Adding a wildcard symbol may retrieve word variants: thuat sach ky nang ((x hoi) or (o hoi)). hieu ve cao suc van ((hanh de) OR (hanh kem)) cua te*.