Perhaps you should try some spelling variations:
cach thuc » anh thuc, cac thu
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
truc van » truc va, thuc van, truc ban
tuc van » thuc van, tuc va, duc van
vai cua » dai cua, hai cua, lai cua
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
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) OR (truc 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) OR (truc van)) hanh vai cua cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) or (cach thuc)) xang xa hoi. hieu van nam ((tuc van) OR (truc 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) OR (truc van)) hanh vai cua cu*.