Perhaps you should try some spelling variations:
hang tai » hang va, dung tai
cau thuc » cau truc, cuu thuc, can thuc
tu sach » thu sach, su sach, te sach
tai cua » thai cua, tai cuc, tri cua
va hang » van hang, va nang, va lang
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
ty nang » ky nang, ty hang, ly nang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty xang)) xa hoi. ((hieu ve) OR (hieu qua)) cau thuc va hang tai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) OR (ty xang)) xa hoi. ((hieu ve) or (hieu qua)) cau thuc va hang tai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) OR (ty xang)) xa hoi. ((hieu ve) or (hieu qua)) cau thuc va hang tai cua tre*.