Perhaps you should try some spelling variations:
sach han » sach tham, sach danh, sach nang
han nang » phan nang, van nang, ban nang
truc van » truc va, thuc van, truc ban
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hanh le » thanh le, hanh ve, hanh de
cua tre » cua te, cuu tre, cua triet
ve cau » ke cau, va cau, ve cac
le cua » ly cua

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: su sach han nang xa hoi. hieu ((ve cau) OR (va cac)) truc van hanh le cua tre~.
• Adding a wildcard symbol may retrieve word variants: su sach han nang xa hoi. hieu ((ve cau) or (va cac)) truc van hanh le cua tre*.