Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
su sach » so sach, vu sach
lai cua » dai cua, hai cua, lai chau
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
nang co » nang doc, nang noi, nang hoc
xac va » tac va, ac va, bac va
tuc va » thuc va, truc va, tuc xa
ve cam » ve cham, ve cac, va cam

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 ty ((nang co) OR (nang cao)) loi. hieu ve cam ((xac va) or (tuc va)) thanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((nang co) OR (nang cao)) loi. hieu ve cam ((xac va) OR (tuc va)) thanh lai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((nang co) OR (nang cao)) loi. hieu ve cam ((xac va) or (tuc va)) thanh lai cua tre*".