Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cao viet » dao viet, co viet, ca viet
hanh va » hang va, hanh vi
tu cach » tu cac
hieu ve » hieu va, hieu van
xang xa » lang xa, mang xa, ang xa
luc va » tuc va, loc va
va cao » va cac, va co, va dao
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (thuoc sach)) ty xang xa hoi. hieu ve cac ((duc va) or (luc va)) hanh va cao viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (thuoc sach)) ty xang xa hoi. hieu ve cac ((duc va) OR (luc va)) hanh va cao viet.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (thuoc sach)) ty xang xa hoi. hieu ve cac ((duc va) or (luc va)) hanh va cao viet*.