Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nam truc » nam truoc, nam thuc, nam trung
hanh vai » hanh vi, hanh va, hanh tai
sach ky » sach y, sach ty, sach kem
truc xa » tuc xa, truc va, truoc xay
xa hanh » xa thanh, xa khanh, va hanh
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo
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: te ((sach ky) OR (sac ky)) nang ((xa hoi) or (ma hoa)). hieu van nam truc xa hanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sac ky)) nang ((xa hoi) OR (ma hoa)). hieu van nam truc xa hanh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) OR (sac ky)) nang ((xa hoi) or (ma hoa)). hieu van nam truc xa hanh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) OR (sac ky)) nang ((xa hoi) or (ma hoa)). hieu van nam truc xa hanh vai cuu tre*.