Perhaps you should try some spelling variations:
thi hang » thi nang, thi hong, thi thanh
hanh lai » hanh lam, hanh tai, thanh lap
thi hanh » thi thanh
hieu van » hieu va, thien van, lieu va
so sach » so sanh, bo sach, co sach
truc va » thuc va, thuc vat, trung va
lai cua » dai cua, hai cua, lai chau
van lam » van nam
xuc va » duc va, tuc va, luc va
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: so sach ((thi hang) OR (thi hanh)) xa hoi. hieu van lam ((xuc va) OR (truc va)) hanh lai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((thi hang) OR (thi hanh)) xa hoi. hieu van lam ((xuc va) or (truc va)) hanh lai cua te~".
• Adding a wildcard symbol may retrieve word variants: so sach ((thi hang) OR (thi hanh)) xa hoi. hieu van lam ((xuc va) or (truc va)) hanh lai cua te*.