Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, va tinh, le thanh
lam xuc » cam xuc, lam duoc
van lam » van nam
cua tre » cua te, cuu tre, cua triet
tang xa » trang xa, lang xa, tang ha
tang ma » mang may, tang van
sac ky » cac ky, sai ky
di cua » dai cua, doi cua, de cua
tu sac » tu sach, tu cac, tu san

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