Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
ban hanh » ban hang
cua tre » cua te, cuu tre, cua triet
ky sang » ky nang, ky dang, ky tang
sang ma » tang ma, nang ma, sang tao
vi cua » vai cua, di cua
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
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 sac ky sang ma hoi. hieu ((van lam) or (van nam)) xuc ((ban hanh) or (van thanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky sang ma hoi. hieu ((van lam) OR (van nam)) xuc ((ban hanh) OR (van thanh)) vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky sang ma hoi. hieu ((van lam) or (van nam)) xuc ((ban hanh) or (van thanh)) vi cua tre*.