Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
thuc va » thuc vat, thuc dan, thuc day
cuu tre » cua tre, cau treo
dinh ca » dinh cac, dinh cua, dinh cao
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
truc va » thuc vat, trung va
qua cac » cua cac
nang xa » nang x, lang xa, nang ma

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 ky nang xa hoi. hieu qua cac ((truc va) OR (thuc va)) dinh ca ((cuu tre) OR (cau tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu qua cac ((truc va) OR (thuc va)) dinh ca ((cuu tre) or (cau tren))~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu qua cac ((truc va) OR (thuc va)) dinh ca ((cuu tre) or (cau tren))*.