Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
te sach » toc sach
ky lang » ky dang, ky tang, tay lang
van cau » van dau, van hau, van chat
vai cua » dai cua, hai cua, lai cua
tuc va » thuc va, truc va, tuc xa
cua te » cua tu

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: te sach ((ky lang) OR (ky nang)) xa hoi. hieu van cau ((duc va) OR (tuc va)) hanh vai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky lang) OR (ky nang)) xa hoi. hieu van cau ((duc va) or (tuc va)) hanh vai cua te~".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky lang) OR (ky nang)) xa hoi. hieu van cau ((duc va) or (tuc va)) hanh vai cua te*.