Perhaps you should try some spelling variations:
van cam » van nam, van cau, van dam
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
van lam » van nam
te sach » toc sach
sach ty » sach y, sach tu, sach thu
xay hoi » tay hoi, cay phoi, gay thoi
ty dang » ty xang, ky dang, ty hang
va cua » va chua, via cua, ca cua
cua te » cua tu

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 dang ((xay hoi) or (xa hoi)). hieu ((van cam) or (van lam)) duc va hanh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty dang ((xay hoi) OR (xa hoi)). hieu ((van cam) OR (van lam)) duc va hanh va cua te.
• Adding a wildcard symbol may retrieve word variants: te sach ty dang ((xay hoi) or (xa hoi)). hieu ((van cam) or (van lam)) duc va hanh va cua te*.