Perhaps you should try some spelling variations:
sach day » sach dao, sach dat, sach dau
day dong » dao dong, dan dong, dam dong
chua tre » chua tri, cua tre, chua trieu
so sach » so sanh, bo sach, co sach
dong xa » dong xay, duong xa, dong ha
vi chua » va chua, vi khuan, chi chua
va lam » van lam
va lap » va dap
xuc va » tuc va, luc va, xac va

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach day dong xa hoi. hieu ((va lam) OR (va lap)) ((xuc va) or (duc va)) hanh vi chua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach day dong xa hoi. hieu ((va lam) OR (va lap)) ((xuc va) OR (duc va)) hanh vi chua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach day dong xa hoi. hieu ((va lam) OR (va lap)) ((xuc va) or (duc va)) hanh vi chua tre".
• Adding a wildcard symbol may retrieve word variants: so sach day dong xa hoi. hieu ((va lam) OR (va lap)) ((xuc va) or (duc va)) hanh vi chua tre*.