Perhaps you should try some spelling variations:
nguoi sach » nguoi san, nuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
hanh vai » hanh vi, hanh va, hanh tai
dang xay » dang van, van xay
va cham » va chat, va tham
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
xuc va » duc va, tuc va, luc va
va cam » va cac, va cao, va cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc sach) or (nguoi sach)) ky dang xay hoi. hieu ((va cam) or (va cham)) xuc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (nguoi sach)) ky dang xay hoi. hieu ((va cam) OR (va cham)) xuc va hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) or (nguoi sach)) ky dang xay hoi. hieu ((va cam) or (va cham)) xuc va hanh vai cua tre*.