Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
nang noi » nang doc
su sach » so sach, vu sach
dat cua » dai cua, day cua, mat cua
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 cao, nang doc, nang hoc
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
ve cac » va cac, vien cac

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