Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
nang xa » lang xa, nang ma, mang xa
lam xuc » lam duoc
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
su cac » tu cac, su cao, su can

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

• Performing a fuzzy search may retrieve terms with similar spellings: su cac ky ((nang xa) or (nang x)) hoi. hieu van ((lam xuc) OR (cam xuc)) va thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cac ky ((nang xa) OR (nang x)) hoi. hieu van ((lam xuc) OR (cam xuc)) va thanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su cac ky ((nang xa) or (nang x)) hoi. hieu van ((lam xuc) OR (cam xuc)) va thanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: su cac ky ((nang xa) or (nang x)) hoi. hieu van ((lam xuc) OR (cam xuc)) va thanh vai cua tre*.