Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
dua tren » dung tren
bat hanh » bat khanh, ban hanh, bao hanh
hieu va » lieu va, hieu qua
cao luc » bao luc, cao duc, cao suc
luc bat » suc bat, luc nhat, luat bat
hanh ve » hanh vi, hanh va, hanh kem
cua tre » cuu tre, cua triet, cua thep
nang xa » nang x, lang xa, nang ma
va cao » va cac, va co, va dao
y nang » ky nang, ly nang, v nang
cua te » cua tu

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

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