Perhaps you should try some spelling variations:
lam thuoc » nam thuoc, am thuc, cay thuoc
thuoc vat » thuc vat, thuoc va, thuoc bat
vat hanh » vat thanh, van hanh, va hanh
thu sach » thuat sach, thuoc sach, thu hoach
hieu va » lieu va, hieu qua
hanh di » hanh vi, hanh de, hang di
tu sach » su sach, tu cach, vu sach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
va lam » van lam, va lap
di cua » dai cua, doi cua, de 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 (te sach))) or (thu sach)) ky lang xa hoi. hieu va lam thuoc vat hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (te sach))) OR (thu sach)) ky lang xa hoi. hieu va lam thuoc vat hanh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((tu sach) OR (te sach))) or (thu sach)) ky lang xa hoi. hieu va lam thuoc vat hanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) OR (te sach))) or (thu sach)) ky lang xa hoi. hieu va lam thuoc vat hanh di cua tre*.