Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ve cham » va cham, ve chat, vu cham
cao hoi » cau hoi, co hoi, cao hoc
cua tre » cua te, cuu tre, cua triet
ve cai » va cai, ve cac, ve tai
va dan » ca dan, va dao, va dau
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang cao hoi. hieu ((ve cai) or (ve cham)) xuc ((va dan) or (van thanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang cao hoi. hieu ((ve cai) OR (ve cham)) xuc ((va dan) OR (van thanh)) vi cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang cao hoi. hieu ((ve cai) or (ve cham)) xuc ((va dan) or (van thanh)) vi cua tre*.