Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
cua tre » cua te, cuu tre, cua triet
cam tuc » cam xuc, nam thuc, dam thuc
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
vi cua » vai cua, di cua
cam tu » cam thu, nam tu, dam tu
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky

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 ((nang xa) or (nang ma)) hoi. hieu ve ((cam tuc) OR (cam tu)) va thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang xa) OR (nang ma)) hoi. hieu ve ((cam tuc) OR (cam tu)) va thanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((nang xa) or (nang ma)) hoi. hieu ve ((cam tuc) OR (cam tu)) va thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang xa) or (nang ma)) hoi. hieu ve ((cam tuc) OR (cam tu)) va thanh vi cua tre*.