Perhaps you should try some spelling variations:
thien van » thi van
hanh lai » hanh lam, hanh tai, thanh lap
chu viet » che viet, khau viet, su viet
sach thu » sach thue, sach thieu, sach tham
sach ty » sach y, sach tu, xach tay
van cac » van hac, van cau, van bac
lai chu » lai chau, lam chu, lai cho
xang x » nang x
luc va » tuc va, loc va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach ty) OR (sach thu)) xang x ho. thien van cac ((luc va) OR (duc va)) hanh lai chu viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sach ty) OR (sach thu)) xang x ho. thien van cac ((luc va) or (duc va)) hanh lai chu viet~".
• Adding a wildcard symbol may retrieve word variants: vu ((sach ty) OR (sach thu)) xang x ho. thien van cac ((luc va) or (duc va)) hanh lai chu viet*.