Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hanh vai » hanh vi, hanh va, hanh tai
cua tre » cua te, cuu tre, cua triet
xa hanh » xa thanh, xa khanh, va hanh
tu nong » tu dong, tu cong, tu tong
nong xa » song xa, dong xa, nong va
vai cua » dai cua, hai cua, lai cua
suc xa » tuc xa, buc xa, suc ma
va cao » va co, va dao, va bao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc sinh) or (thuoc sach)) tu nong xa hoi. hieu ((va cao) OR (va cac)) suc xa hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sinh) OR (thuoc sach)) tu nong xa hoi. hieu ((va cao) OR (va cac)) suc xa hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sinh) or (thuoc sach)) tu nong xa hoi. hieu ((va cao) OR (va cac)) suc xa hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((hoc sinh) or (thuoc sach)) tu nong xa hoi. hieu ((va cao) OR (va cac)) suc xa hanh vai cua tre*.