Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
sach thu » sach thue, sach tham, cach thuc
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
cao loi » co loi, cao tuoi, ngao loi
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach thu) or (sach thieu)) nang cao loi. hieu va cam ((xuc va) OR (tuc va)) thanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach thu) OR (sach thieu)) nang cao loi. hieu va cam ((xuc va) OR (tuc va)) thanh lai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach thu) or (sach thieu)) nang cao loi. hieu va cam ((xuc va) OR (tuc va)) thanh lai cua tre".
• Adding a wildcard symbol may retrieve word variants: su ((sach thu) or (sach thieu)) nang cao loi. hieu va cam ((xuc va) OR (tuc va)) thanh lai cua tre*.