Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hanh lai » hanh lam, hanh tai, thanh lap
sach ty » sach y, sach tu, sach thu
hanh va » hang va, hanh vi
co sach » bo sach, cuon sach, hoc sach
van hoc » van hoa
van hac » van ha, van hai, van chat
xang xa » lang xa, mang xa, ang xa
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach ty xang xa hoi. hieu ((van hac) OR (van hoc)) xuc va ((hanh lai) or (hanh va)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach ty xang xa hoi. hieu ((van hac) OR (van hoc)) xuc va ((hanh lai) OR (hanh va)) cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach ty xang xa hoi. hieu ((van hac) OR (van hoc)) xuc va ((hanh lai) or (hanh va)) cua viet".
• Adding a wildcard symbol may retrieve word variants: co sach ty xang xa hoi. hieu ((van hac) OR (van hoc)) xuc va ((hanh lai) or (hanh va)) cua viet*.