Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
van nang » van quang, van dong, van dung
cao suc » cao su, cao duc
va cao » va cac, va co, va dao
suc va » duc va, tuc va, luc va
dau di » dau da, dau do, dau dien
cua te » cua tu
x hoi » xa hoi, o hoi, x ho
da di » pa di, da gi, ma di

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((van nang) or (van ban)) x hoi. lieu va cao suc va ((dau di) OR (da di)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((van nang) OR (van ban)) x hoi. lieu va cao suc va ((dau di) OR (da di)) cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((van nang) or (van ban)) x hoi. lieu va cao suc va ((dau di) OR (da di)) cua te*".