Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
dau truc » cau truc, dai truc, doan truc
va hanh » van hanh, va thanh, va danh
cua tre » cuu tre, cua triet, dua tren
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
sach ky » sach y, sach ty, sach kem
truc va » thuc va, thuc vat, trung va
va dau » va dao
sac ky » cac ky, sai ky
cua te » cua tu

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

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