Perhaps you should try some spelling variations:
huong doi » huong dan, trong doi, dung doi
xa huong » xa phuong, va huong, xa muong
cua viet » ca viet, hoa viet, cua vat
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cai
va cao » va cac, va co, va dao
x hoi » xa hoi, o hoi, x ho

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