Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thanh ve » hanh ve, thanh va, thanh vien
su triet » su viet, su tien, ve triet
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
duc bat » duoc bat, duc ban, luc bat
duc bao » du bao, duc dao, duc ban
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang

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 cac ((duc bat) OR (duc bao)) thanh ve ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach y nang xa hoi. hieu va cac ((duc bat) OR (duc bao)) thanh ve ((cua tre) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach y nang xa hoi. hieu va cac ((duc bat) OR (duc bao)) thanh ve ((cua tre) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: thuoc sach y nang xa hoi. hieu va cac ((duc bat) OR (duc bao)) thanh ve ((cua tre) or (su triet))*.