Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
thi hanh » thi thanh
tu sach » thu sach, su sach, te sach
ve cham » va cham, ve chat, vu cham
vai cua » dai cua, hai cua, lai cua
xuc van » duc van, luc van, vuc van
cua tre » cua te, cuu tre, cua triet
ty hang » ly hang, ty xang, thi hang
ve cai » va cai, ve cac, ve tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ty hang) or (thi hanh)) xa hoi. hieu ((ve cai) or (ve cham)) xuc van hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty hang) OR (thi hanh)) xa hoi. hieu ((ve cai) OR (ve cham)) xuc van hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty hang) or (thi hanh)) xa hoi. hieu ((ve cai) or (ve cham)) xuc van hanh vai cua tre*.