Perhaps you should try some spelling variations:
te sach » toc sach
sach ty » sach y, sach tu, sach thu
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
ve cac » va cac, vien cac
ke cau » ket cau
di cua » dai cua, doi cua, de cua
cua te » cua tu
x hoi » xa hoi, o hoi, 5 hoi

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 ty xang ((x hoi) OR (x ho)). hieu ((ve cac) or (ke cau)) duc va hanh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty xang ((x hoi) OR (x ho)). hieu ((ve cac) OR (ke cau)) duc va hanh di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty xang ((x hoi) OR (x ho)). hieu ((ve cac) or (ke cau)) duc va hanh di cua te".
• Adding a wildcard symbol may retrieve word variants: te sach ty xang ((x hoi) OR (x ho)). hieu ((ve cac) or (ke cau)) duc va hanh di cua te*.