Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
hieu tuc » hieu thuc, hieu luc, hieu thuoc
tuc cham » toc cham, tu cham, phuc cham
van cua » vang cua, ban cua, dan cua
duc van » duc va, duc tan, duc manh
xuc van » luc van, vuc van, xuc ban
co sach » bo sach, cuon sach, hoc sach
sach ty » sach y, sach tu, sach thu
hoa hoi » khoa hoi, hoa doi, hoc hoi
ty dong » tay dong, tu dong, ly dong
cua tre » cua te, cuu tre, cua triet

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 dong ((hoa hoi) OR (hoa hoc)). hieu tuc cham ((xuc van) or (duc van)) thanh van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach ty dong ((hoa hoi) OR (hoa hoc)). hieu tuc cham ((xuc van) OR (duc van)) thanh van cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach ty dong ((hoa hoi) OR (hoa hoc)). hieu tuc cham ((xuc van) or (duc van)) thanh van cua tre".
• Adding a wildcard symbol may retrieve word variants: co sach ty dong ((hoa hoi) OR (hoa hoc)). hieu tuc cham ((xuc van) or (duc van)) thanh van cua tre*.