Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
chua tre » chua tri, cua tre, chua trieu
vu cham » va cham, vu kham, tu cham
vi chua » va chua, vi khuan, chi chua
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ve chat » va chat, van chat
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky sang ma hoi. hieu ((ve chat) or (vu cham)) xuc ((va hanh) or (van thanh)) vi chua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky sang ma hoi. hieu ((ve chat) OR (vu cham)) xuc ((va hanh) OR (van thanh)) vi chua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky sang ma hoi. hieu ((ve chat) or (vu cham)) xuc ((va hanh) or (van thanh)) vi chua tre*.