Perhaps you should try some spelling variations:
cay phoi » cap phoi, tay hoi, cay cho
dinh lai » dinh lam, dinh lap, dinh tai
lam thuc » lam thuoc, nam thuc, dam thuc
sach phu » sach thu, sach phat, sach thue
thu sach » tu sach, thuat sach, thuoc sach
phu dang » phu dong, phu lang, thu dang
xay hoi » xa hoi, tay hoi, gay thoi
va dinh » van dinh, va kinh, va tinh
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach phu dang ((xay hoi) or (cay phoi)). hieu qua ((lam thuc) OR (am thuc)) va dinh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach phu dang ((xay hoi) OR (cay phoi)). hieu qua ((lam thuc) OR (am thuc)) va dinh lai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach phu dang ((xay hoi) or (cay phoi)). hieu qua ((lam thuc) OR (am thuc)) va dinh lai cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach phu dang ((xay hoi) or (cay phoi)). hieu qua ((lam thuc) OR (am thuc)) va dinh lai cua tre*.