Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve phap » va phap, de phap, ve phan
moi dan » moi dang, hoi dan, doi dan
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
mo dan » mo danh, co dan, so dan

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: so sach ky nang xa hoi. hieu ve phap ((mo dan) OR (moi dan)) thanh hai cua tre~.
• Adding a wildcard symbol may retrieve word variants: so sach ky nang xa hoi. hieu ve phap ((mo dan) or (moi dan)) thanh hai cua tre*.