Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
thai cua » than cua, tai cuc, tri cua
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
xa hanh » xa thanh, xa khanh, va hanh
cam tuc » cam xuc, nam thuc, dam thuc
mang xa » lang xa, mang may, dang xay
sac ky » cac ky, sai ky
cam tu » cam thu, nam tu, dam tu
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 ((mang xa) or (nang x)) hoi. hieu van ((cam tuc) OR (cam tu)) xa hanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((mang xa) OR (nang x)) hoi. hieu van ((cam tuc) OR (cam tu)) xa hanh thai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((mang xa) or (nang x)) hoi. hieu van ((cam tuc) OR (cam tu)) xa hanh thai cua tre*".