Perhaps you should try some spelling variations:
sach thue » sach thieu, sach tham, cach thuc
hanh lai » hanh lam, hanh tai, thanh lap
sach thu » sach thieu, sach tham, cach thuc
van hanh » van thanh, ban hanh, van anh
xach tay » canh tay
hieu van » hieu va, thien van, lieu va
cac lop » cac hop, cac loai
lai cua » dai cua, hai cua, lai chau
lop van » lo van, long van, loai van
van cac » van hac, van cau, van bac
hang xa » hoang xa, hang va, hang ca
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((xach tay) or (((sach thu) or (sach thue)))) hang xa hoi. hieu van cac lop van hanh lai cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((xach tay) OR (((sach thu) OR (sach thue)))) hang xa hoi. hieu van cac lop van hanh lai cua su.
• Adding a wildcard symbol may retrieve word variants: tu ((xach tay) or (((sach thu) or (sach thue)))) hang xa hoi. hieu van cac lop van hanh lai cua su*.