Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
lam thuc » lam thuoc, am thuc, nam thuc
phu dang » phu dong, phu lang, thu dang
dinh tai » dinh toai, dinh tri, dinh thi
dinh lai » dinh lam, dinh lap, dinh hai
cay phoi » cap phoi, tay hoi, cay cho
sach phu » sach thu, sach phat, sach thue
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
xay hoi » xa hoi, tay hoi, gay thoi
cua tre » cua te, cuu tre, cua triet
va lam » van lam, va lap

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 va lam thuc va ((dinh lai) OR (dinh tai)) 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 va lam thuc va ((dinh lai) OR (dinh tai)) 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 va lam thuc va ((dinh lai) OR (dinh tai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach phu dang ((xay hoi) or (cay phoi)). hieu va lam thuc va ((dinh lai) OR (dinh tai)) cua tre*.