Perhaps you should try some spelling variations:
huong doi » huong dan, trong doi, dung doi
va huong » va thuong, va phuong, va tuong
so sach » so sanh, bo sach, co sach
cam tuc » cam xuc, cam tu, nam thuc
cua tre » cuu tre, cua triet, dua tren
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
va cam » va cham, va cac, va cao
cua te » cua tu
tuc va » thuc va, truc va, tuc xa
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky nang ((x hoi) OR (o hoi)). hieu va cam tuc va huong doi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang ((x hoi) OR (o hoi)). hieu va cam tuc va huong doi ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang ((x hoi) OR (o hoi)). hieu va cam tuc va huong doi ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: so sach ky nang ((x hoi) OR (o hoi)). hieu va cam tuc va huong doi ((cua tre) or (cua te))*.