Perhaps you should try some spelling variations:
sach van » sach han, bach van, cach van
van hanh » van thanh, ban hanh, van anh
sach va » sach xa, sach ha, sach dao
hieu ve » hieu va, hieu van
xuc van » duc van, luc van, xuc ban
hanh va » hang va, hanh vi
su tien » su kien, su hien, tu tieng
ma hoi » mai hoi, ma hoa, me hoi
ve cam » ve cham, ve cac, va cam

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 van) or (sach va)) nang ((ma hoi) OR (xa hoi)). hieu ve cam xuc van hanh va su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach van) OR (sach va)) nang ((ma hoi) OR (xa hoi)). hieu ve cam xuc van hanh va su tien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach van) or (sach va)) nang ((ma hoi) OR (xa hoi)). hieu ve cam xuc van hanh va su tien".
• Adding a wildcard symbol may retrieve word variants: tu ((sach van) or (sach va)) nang ((ma hoi) OR (xa hoi)). hieu ve cam xuc van hanh va su tien*.