Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
ky trong » ly trong, ke trong, cay trong
hieu cao » chieu cao, hieu cac, hieu ca
chat tuc » chat xuc, luat tuc, chat huu
tu sach » thu sach, su sach, te sach
cac hoc » cach hoc, cac hop, bac hoc
xa hanh » xa thanh, xa khanh, va hanh
hanh va » hang va, hanh vi
cua tre » cua te, cuu tre, cua triet
va cua » va chua, via cua, ca cua

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) OR (thuoc sach)) ky trong cac hoc. hieu cao chat tuc xa hanh va cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thuoc sach)) ky trong cac hoc. hieu cao chat tuc xa hanh va cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thuoc sach)) ky trong cac hoc. hieu cao chat tuc xa hanh va cua tre*.