Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van chay » van chat, san chay, toan chay
hanh vai » hanh vi, hanh va, hanh tai
ban hanh » ban hang
cua tre » cuu tre, cua triet, dua tren
dua ban » dia ban, cua ban, qua ban
sach ky » sac ky, sach y, sach kem
tang ma » mang may, tang van
sach ty » sach y, sach tu, sach thu
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) OR (sach ty)) tang ma hoa. hieu van chay dua ban hanh vai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach ty)) tang ma hoa. hieu van chay dua ban hanh vai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sach ty)) tang ma hoa. hieu van chay dua ban hanh vai ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sach ty)) tang ma hoa. hieu van chay dua ban hanh vai ((cua tre) or (cua te))*.