Perhaps you should try some spelling variations:
thanh ve » hanh ve, thanh va, thanh vien
va thanh » gia thanh, ban thanh, va tinh
nam thuc » nam thuoc, am thuc, nam thu
thuc va » thuc vat, thuc dan, thuc day
cua tre » cuu tre, cua triet, dua tren
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va, hieu van
tu cai » tu cac, tu can, tu cay
ve nam » he nam, va nam, le nam
tu bai » tu ban, tu bat, te bai
cua te » cua tu

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 cai) OR (tu bai)) ky nang cao hoi. hieu ve nam thuc va thanh ve ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cai) OR (tu bai)) ky nang cao hoi. hieu ve nam thuc va thanh ve ((cua tre) or (cua te))~".
• Adding a wildcard symbol may retrieve word variants: ((tu cai) OR (tu bai)) ky nang cao hoi. hieu ve nam thuc va thanh ve ((cua tre) or (cua te))*.