Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va
cao luc » bao luc, cao duc, cao suc
luc ban » duc ban, cuc ban, luc bat
hanh ve » hanh vi, hanh va, hanh kem
cua tre » cua te, cuu tre, dua tren
v nang » va nang, vu nang, van nang
sach v » sach va, sach y, sach 2

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 v nang xa hoi. ((hieu va) or (hieu qua)) cao luc ban hanh ve ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach v nang xa hoi. ((hieu va) OR (hieu qua)) cao luc ban hanh ve ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: thuoc sach v nang xa hoi. ((hieu va) or (hieu qua)) cao luc ban hanh ve ((cua tre) or (cua triet))*.