Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
hieu van » hieu va, thien van, lieu va
sach tu » sach thu, cach tu, sach uu
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach thu, xach tay
van cac » van hac, van cau, van bac
vai cua » dai cua, hai cua, lai cua
cua te » cua tu
ac va » tac va, bac va, mac va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach ty) OR (sach tu)) nang xa hoi. hieu van cac ((ac va) or (duc va)) hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ty) OR (sach tu)) nang xa hoi. hieu van cac ((ac va) OR (duc va)) hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ty) OR (sach tu)) nang xa hoi. hieu van cac ((ac va) or (duc va)) hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ty) OR (sach tu)) nang xa hoi. hieu van cac ((ac va) or (duc va)) hanh vai cua te*.