Perhaps you should try some spelling variations:
cach thuc » anh thuc, cac thu
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
hanh vai » hanh vi, hanh va, hanh tai
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
nam tuc » nam thuc, nam truc, nam tu
tuc van » thuc van, truc van, tuc va
vai cua » dai cua, hai cua, lai cua
cua cu » cua chu, cua cau, cua su

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 ty) or (cach thuc)) xang xa hoi. hieu van nam tuc van hanh vai cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (cach thuc)) xang xa hoi. hieu van nam tuc van hanh vai cua cu.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (cach thuc)) xang xa hoi. hieu van nam tuc van hanh vai cua cu*.