Perhaps you should try some spelling variations:
khanh vai » khanh van, hanh vi, hanh va
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
xa khanh » xa thanh, van khanh, dat khanh
tu nong » tu dong, tu cong, tu tong
nong xa » song xa, dong xa, nong va
hieu va » lieu va, hieu qua
cac duc » cac du, cao duc, cac dac
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
duc xa » duoc xa, tuc xa, duc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (hoc sach)) tu nong xa hoi. hieu va cac duc xa khanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) tu nong xa hoi. hieu va cac duc xa khanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc sach)) tu nong xa hoi. hieu va cac duc xa khanh vai cua tre*.