Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty hang » ly hang, ty xang, thi hang
hang xa » hoang xa, hang va, hang ca
hieu ve » hieu va, hieu van
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
xac va » tac va, ac va, bac va
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty hang xa hoi. hieu ve cac ((xac va) or (tuc va)) hanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty hang xa hoi. hieu ve cac ((xac va) OR (tuc va)) hanh lai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ty hang xa hoi. hieu ve cac ((xac va) or (tuc va)) hanh lai cua tre*.